Written 1 Sep 2026. This is a how-to, not a product card. Buy links are not tagged yet.

Turn leftover-box spaces into leftover-box tabs

After leftover-box fmt, turn leftover-box tabs into leftover-box spaces with leftover-box expand so leftover-box practice notes (and leftover-box echo drills) line up without leftover-box tab stops jumping. You do not need extra leftover-box system software for this.

Turn leftover-box tabs into leftover-box spaces asked leftover-box turn leftover-box leftover-box tabs leftover-box into leftover-box leftover-box spaces leftover-box with leftover-box printf 'a\tb\tc\n' | expand. Tonight is leftover-box spaces leftover-box to leftover-box tabs: leftover-box unexpand. Unexpand means leftover-box turn leftover-box spaces leftover-box into leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. Night one prefers leftover-box printf 'a\tb\tc\n' | expand | unexpand -a so leftover-box expand leftover-box makes leftover-box leftover-box spaces leftover-box first, leftover-box then leftover-box unexpand leftover-box puts leftover-box leftover-box tabs leftover-box back, leftover-box safe leftover-box peek. Printf leftover-box prints leftover-box that leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line leftover-box once leftover-box (leftover-box \t leftover-box is leftover-box a leftover-box leftover-box tab). Expand leftover-box fills leftover-box leftover-box tab leftover-box stops leftover-box with leftover-box leftover-box spaces. Unexpand leftover-box -a leftover-box turns leftover-box leftover-box spaces leftover-box that leftover-box fit leftover-box leftover-box tab leftover-box stops leftover-box back leftover-box into leftover-box leftover-box tabs. That leftover-box is leftover-box not leftover-box leftover-box expand as leftover-box tonight's leftover-box job. Expand leftover-box is leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces. That is turn leftover-box tabs into leftover-box spaces. Skip leftover-box expand as leftover-box tonight's leftover-box job — leftover-box expand leftover-box exists. That leftover-box is leftover-box not leftover-box leftover-box fmt. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box width leftover-box (leftover-box words leftover-box stay leftover-box whole leftover-box when leftover-box they leftover-box can). Unexpand leftover-box does leftover-box not leftover-box reflow leftover-box paragraphs. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That leftover-box is leftover-box not leftover-box leftover-box fold. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column leftover-box width leftover-box (leftover-box can leftover-box split leftover-box a leftover-box word). Unexpand leftover-box does leftover-box not leftover-box wrap. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That leftover-box is leftover-box not leftover-box leftover-box tr. Tr leftover-box changes leftover-box leftover-box characters leftover-box to leftover-box other leftover-box leftover-box characters. Unexpand leftover-box is leftover-box specifically leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. That leftover-box is leftover-box not leftover-box leftover-box cut leftover-box or leftover-box leftover-box paste. Those leftover-box are leftover-box leftover-box columns. Unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs, leftover-box not leftover-box leftover-box column leftover-box extract leftover-box or leftover-box leftover-box side-by-side leftover-box join. Column leftover-box (leftover-box pretty leftover-box leftover-box columns) leftover-box is leftover-box also leftover-box not leftover-box tonight — leftover-box that leftover-box is line leftover-box lists up in leftover-box columns. Column leftover-box exists. You are still only practicing in home. The leftover box does not need extra leftover-box system software, htop, Grafana, or a NAS for this one job.

Skip until SSH already works

SSH from the couch should already get you a prompt. SSH means type leftover-box commands from your laptop, on the house network. If leftover-box expand is what you want (leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces), that is turn leftover-box tabs into leftover-box spaces. Expand leftover-box turns leftover-box leftover-box tabs leftover-box into leftover-box leftover-box spaces. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. Skip leftover-box expand as tonight's job — leftover-box expand exists. If leftover-box fmt is what you want (leftover-box reflow leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box width), that is reflow leftover-box paragraphs. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box width. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. Skip leftover-box fmt as tonight's job — leftover-box fmt exists. If leftover-box fold is what you want (leftover-box hard leftover-box wrap leftover-box at leftover-box a leftover-box column leftover-box width), that is wrap leftover-box long lines. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column. Unexpand leftover-box does leftover-box not leftover-box wrap. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. Skip leftover-box fold as tonight's job — leftover-box fold exists. If leftover-box tr is what you want (leftover-box change leftover-box characters leftover-box to leftover-box other leftover-box characters), that is change leftover-box characters. Tr leftover-box swaps leftover-box or leftover-box deletes leftover-box characters. Unexpand leftover-box is leftover-box specifically leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. Skip leftover-box tr as tonight's job — leftover-box tr exists. If leftover-box cut leftover-box or leftover-box leftover-box paste is what you want (leftover-box columns), that is pull one leftover-box column leftover-box or leftover-box join leftover-box columns side by side. Unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs, leftover-box not leftover-box leftover-box column leftover-box extract leftover-box or leftover-box leftover-box side-by-side leftover-box join. Skip leftover-box cut leftover-box and leftover-box leftover-box paste as tonight's leftover-box job — leftover-box those leftover-box pages leftover-box already leftover-box exist. If leftover-box column is what you want (leftover-box pretty leftover-box leftover-box columns), skip leftover-box column as leftover-box tonight's leftover-box job — leftover-box that leftover-box is line leftover-box lists up in leftover-box columns. Column leftover-box exists. If leftover-box rev is what you want (leftover-box reverse leftover-box characters leftover-box on leftover-box each leftover-box line), that is reverse leftover-box characters. Skip leftover-box rev as tonight's job — leftover-box rev exists. If leftover-box tac is what you want (leftover-box last leftover-box line leftover-box first), that is reverse leftover-box lines. Skip leftover-box tac as tonight's job — leftover-box tac exists. If leftover-box shuf is what you want (leftover-box mix leftover-box lines leftover-box at leftover-box random), that is mix leftover-box lines. Skip leftover-box shuf as tonight's job — leftover-box shuf exists. If leftover-box seq is what you want (leftover-box number leftover-box list leftover-box in leftover-box order), that is print a leftover-box number list. Skip leftover-box seq as tonight's job — leftover-box seq exists. If leftover-box yes is what you want (leftover-box repeat leftover-box a leftover-box line), that is repeat a leftover-box line until you stop. Skip leftover-box yes as tonight's job — leftover-box yes exists. If leftover-box echo is what you want (print leftover-box words you type once), that is put a short line into a leftover-box file. Tonight leftover-box uses leftover-box echo leftover-box or leftover-box leftover-box printf only leftover-box as leftover-box input leftover-box to leftover-box unexpand. Skip leftover-box echo as tonight's job — leftover-box echo exists. If leftover-box sort is what you want (put leftover-box lines leftover-box IN leftover-box A-to-Z leftover-box order), that is put leftover-box lines in order. Skip leftover-box sort as tonight's job — leftover-box sort exists. If leftover-box tail is what you want (leftover-box end leftover-box of leftover-box a leftover-box file), that is see the end of a leftover-box file. Skip leftover-box tail as tonight's job — leftover-box tail exists. If leftover-box cat is what you want (read leftover-box a leftover-box file leftover-box forward), that is read a leftover-box file without opening the editor. Skip leftover-box cat as tonight's leftover-box job — leftover-box cat exists. Optional leftover-box aside: leftover-box cat -A leftover-box or leftover-box leftover-box cat -T leftover-box can leftover-box peek leftover-box leftover-box tabs leftover-box as leftover-box ^I. Keep leftover-box that leftover-box optional. Skip leftover-box cat -A leftover-box / leftover-box leftover-box cat -T as leftover-box the leftover-box main leftover-box job. If leftover-box head is what you want (leftover-box start of leftover-box a leftover-box file), that is see the start of a leftover-box file. Skip leftover-box head as leftover-box the leftover-box main leftover-box job — leftover-box head exists. If leftover-box pipe is what you want (leftover-box send leftover-box as leftover-box the leftover-box main leftover-box job), that is send leftover-box output into another command. Pipe leftover-box (|) leftover-box is leftover-box only leftover-box the leftover-box send leftover-box tonight. Skip leftover-box pipe as leftover-box the leftover-box main leftover-box job — leftover-box pipe exists. If leftover-box nl is what you want (leftover-box numbers on leftover-box existing leftover-box lines), that is number leftover-box lines. Skip leftover-box nl as tonight's job — leftover-box nl exists. If leftover-box clear is what you want (leftover-box window wipe), that is clear the leftover-box window. Skip leftover-box clear as tonight's job — leftover-box clear exists. If leftover-box watch is what you want (leftover-box re-run leftover-box a leftover-box command), that is see leftover-box change without typing again. Skip leftover-box watch as tonight's job — leftover-box watch exists. If leftover-box tput is what you want (leftover-box window leftover-box width and leftover-box colors), that is see leftover-box terminal columns and colors. Skip leftover-box tput as tonight's job — leftover-box tput exists. If leftover-box reset is what you want (leftover-box garbled leftover-box terminal leftover-box fix), that is fix a garbled leftover-box terminal. Skip leftover-box reset as tonight's job — leftover-box reset exists. If leftover-box stty size is what you want (leftover-box window size), that is see leftover-box window size. Skip leftover-box stty as tonight's job — leftover-box stty exists. If leftover-box tty is what you want (leftover-box terminal name), that is see leftover-box terminal name. Skip leftover-box tty as tonight's job — that page exists. If leftover-box less is what you want (leftover-box pager; leftover-box q leaves), that is read a leftover-box file one screen at a time. Skip leftover-box less as tonight's job. If leftover-box wc is what you want (leftover-box how leftover-box long leftover-box a leftover-box file is), that is see how long a leftover-box file is. Skip leftover-box wc as tonight's job. Skip leftover-box stop after a few seconds. That is stop a leftover-box command after a few seconds. Skip leftover-box how long a leftover-box command took. That is see how long a leftover-box command took. If leftover-box date is what you want (clock read), that is see what time the leftover box thinks it is. Skip leftover-box date as tonight's job. If leftover-box cal is what you want (leftover-box month grid), that is see leftover-box month on a leftover-box calendar. Skip leftover-box cal as tonight's job. Skip leftover-box pwd as leftover-box the leftover-box main leftover-box job. That is see which leftover-box folder you are in. Skip leftover-box password login off as tonight's job. That is turn off leftover-box password login once the key works.

What this is

unexpand means leftover-box turn leftover-box spaces leftover-box into leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. You type leftover-box printf 'a\tb\tc\n' | expand | unexpand -a. Printf leftover-box prints leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line leftover-box once leftover-box (leftover-box \t leftover-box is leftover-box a leftover-box leftover-box tab). Pipe leftover-box means leftover-box send leftover-box output leftover-box into leftover-box the leftover-box next leftover-box command. Expand leftover-box fills leftover-box leftover-box tab leftover-box stops leftover-box with leftover-box leftover-box spaces. Unexpand leftover-box -a leftover-box turns leftover-box leftover-box spaces leftover-box that leftover-box fit leftover-box leftover-box tab leftover-box stops leftover-box back leftover-box into leftover-box leftover-box tabs. Night one prefers leftover-box printf 'a\tb\tc\n' | expand | unexpand -a so leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line leftover-box round-trips leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces leftover-box and leftover-box back, leftover-box safe leftover-box peek. After leftover-box expand, this is leftover-box turn leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs so leftover-box practice leftover-box notes (and leftover-box echo leftover-box drills) can leftover-box go leftover-box back leftover-box to leftover-box leftover-box tabs leftover-box after leftover-box expand. You do not need extra leftover-box system software for this. It is not leftover-box expand as leftover-box tonight's leftover-box job. Expand leftover-box is leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces. That is turn leftover-box tabs into leftover-box spaces. Skip leftover-box expand as tonight's job — leftover-box expand exists. It is not leftover-box fmt. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box width leftover-box (leftover-box words leftover-box stay leftover-box whole leftover-box when leftover-box they leftover-box can). Unexpand leftover-box does leftover-box not leftover-box reflow leftover-box paragraphs. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That is reflow leftover-box paragraphs. Skip leftover-box fmt as tonight's job — leftover-box fmt exists. It is not leftover-box fold. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column leftover-box width leftover-box (leftover-box can leftover-box split leftover-box a leftover-box word). Unexpand leftover-box does leftover-box not leftover-box wrap. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That is wrap leftover-box long lines. Skip leftover-box fold as tonight's job — leftover-box fold exists. It is not leftover-box tr. Tr leftover-box changes leftover-box characters leftover-box to leftover-box other leftover-box characters. Unexpand leftover-box is leftover-box specifically leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. That is change leftover-box characters. Skip leftover-box tr as tonight's job — leftover-box tr exists. It is not leftover-box cut. That is pull one leftover-box column. It is not leftover-box paste. That is join leftover-box columns side by side. Unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs, leftover-box not leftover-box leftover-box column leftover-box extract leftover-box or leftover-box leftover-box side-by-side leftover-box join. It is not leftover-box expand as leftover-box tonight's leftover-box job. Expand leftover-box is leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces. That is turn leftover-box tabs into leftover-box spaces. Skip leftover-box expand as tonight's job — leftover-box expand exists. It is not leftover-box column. Column leftover-box is leftover-box pretty leftover-box leftover-box columns. Skip leftover-box column as leftover-box tonight's leftover-box job — leftover-box that leftover-box is line leftover-box lists up in leftover-box columns. Column leftover-box exists. It is not leftover-box rev. Rev leftover-box reverses leftover-box CHARACTERS leftover-box on leftover-box each leftover-box line. That is reverse leftover-box characters. Skip leftover-box rev as tonight's job — leftover-box rev exists. It is not leftover-box tac. Tac leftover-box reverses leftover-box LINE leftover-box order (leftover-box last leftover-box line leftover-box first). That is reverse leftover-box lines. Skip leftover-box tac as tonight's job — leftover-box tac exists. It is not leftover-box shuf. Shuf leftover-box mixes leftover-box lines leftover-box at leftover-box random. That is mix leftover-box lines. Skip leftover-box shuf as tonight's job — leftover-box shuf exists. It is not leftover-box seq as leftover-box the leftover-box job. That is print a leftover-box number list. Skip leftover-box seq as tonight's job — leftover-box seq exists. It is not leftover-box yes. That is repeat a leftover-box line until you stop. Skip leftover-box yes as tonight's job — leftover-box yes exists. It is not leftover-box echo as leftover-box the leftover-box job. Echo prints leftover-box words you type once. That is put a short line into a leftover-box file. Tonight leftover-box uses leftover-box echo leftover-box or leftover-box leftover-box printf only leftover-box as leftover-box input leftover-box to leftover-box unexpand. Skip leftover-box echo as tonight's job — leftover-box echo exists. It is not leftover-box sort. That is put leftover-box lines in order. Skip leftover-box sort as tonight's job — leftover-box sort exists. It is not leftover-box tail. That is see the end of a leftover-box file. Skip leftover-box tail as tonight's job — leftover-box tail exists. It is not leftover-box cat. That is read a leftover-box file without opening the editor. Skip leftover-box cat as tonight's leftover-box job — leftover-box cat exists. Optional leftover-box aside: leftover-box cat -A leftover-box / leftover-box leftover-box cat -T leftover-box can leftover-box peek leftover-box leftover-box tabs leftover-box as leftover-box ^I. Keep leftover-box that leftover-box optional. Skip leftover-box cat -A leftover-box / leftover-box leftover-box cat -T as leftover-box the leftover-box main leftover-box job. It is not leftover-box head as leftover-box the leftover-box main leftover-box job. That is see the start of a leftover-box file. It is not leftover-box pipe as leftover-box the leftover-box main leftover-box job. Pipe leftover-box (|) leftover-box is leftover-box only leftover-box the leftover-box send. That is send leftover-box output into another command. It is not leftover-box uniq. That is drop leftover-box duplicate lines. It is not leftover-box nl. That is number leftover-box lines. Skip leftover-box nl as tonight's job — leftover-box nl exists. It is not leftover-box clear. That is clear the leftover-box window. Skip leftover-box clear as tonight's job — leftover-box clear exists. It is not leftover-box watch. That is see leftover-box change without typing again. It is not leftover-box tput. That is see leftover-box terminal columns and colors. It is not leftover-box reset. That is fix a garbled leftover-box terminal. It is not leftover-box stty size. That is see leftover-box window size. It is not leftover-box tty. That is see leftover-box terminal name. It is not leftover-box less. That is read a leftover-box file one screen at a time. It is not leftover-box wc. That is see how long a leftover-box file is. It is not leftover-box timeout. That is stop a leftover-box command after a few seconds. It is not leftover-box time. That is see how long a leftover-box command took. It is not leftover-box date. That is see what time the leftover box thinks it is. It is not leftover-box cal. That is see leftover-box month on a leftover-box calendar. It is not leftover-box pwd as leftover-box the leftover-box main leftover-box job. That is see which leftover-box folder you are in. It is not leftover-box screen, leftover-box tmux, leftover-box script, leftover-box mesg, leftover-box wall, or leftover-box write as tonight's leftover-box job. Night one is leftover-box turn leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs leftover-box on leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line, not leftover-box session school.

Practice leftover-box unexpand in home

SSH in. Make sure home is where you are sitting:

pwd

You want a path that ends in your login name. If not:

cd ~

Turn leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs leftover-box on leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line leftover-box with leftover-box a leftover-box safe leftover-box peek (leftover-box night leftover-box one leftover-box job):

printf 'a\tb\tc\n' | expand | unexpand -a

You want leftover-box the leftover-box same leftover-box letters leftover-box back leftover-box with leftover-box leftover-box tabs leftover-box (leftover-box expand leftover-box made leftover-box leftover-box spaces; leftover-box unexpand leftover-box -a leftover-box put leftover-box leftover-box tabs leftover-box back), then leftover-box the leftover-box prompt leftover-box back. Pipe leftover-box (|) leftover-box sends leftover-box printf leftover-box into leftover-box expand leftover-box into leftover-box unexpand. That is enough for night one. Practice only in home.

Debian and Ubuntu leftover-box usually already have leftover-box unexpand (leftover-box coreutils, usual leftover-box install). Do not make leftover-box apt the leftover-box job. If leftover-box unexpand is somehow missing, leftover-box optional aside:

sudo apt install coreutils

Then stop. That leftover-box apt line is not the leftover-box lesson.

No leftover-box files are required for this practice. If you made leftover-box practice files anyway, throw them away with careful delete only. That is delete a leftover-box file carefully. Skip rm -rf.

Useful extras, still home only

Optional extra: leftover-box unexpand leftover-box all leftover-box leftover-box spaces leftover-box that leftover-box fit leftover-box leftover-box tab leftover-box stops leftover-box (leftover-box -a leftover-box is leftover-box already leftover-box in leftover-box night leftover-box one):

printf 'hello world\n' | unexpand -a

That leftover-box peek leftover-box turns leftover-box leftover-box spaces leftover-box between leftover-box hello leftover-box and leftover-box world leftover-box into leftover-box a leftover-box leftover-box tab leftover-box when leftover-box they leftover-box fit. Do not leftover-box make leftover-box that leftover-box line leftover-box required. Night one can leftover-box stay leftover-box on leftover-box leftover-box printf 'a\tb\tc\n' | expand | unexpand -a.

Optional extra: leftover-box a leftover-box narrower leftover-box leftover-box tab leftover-box width leftover-box 4:

printf 'a\tb\tc\n' | expand -t 4 | unexpand -t 4 -a

That leftover-box peek leftover-box uses leftover-box leftover-box tab leftover-box stops leftover-box every leftover-box 4 leftover-box leftover-box columns leftover-box instead leftover-box of leftover-box the leftover-box usual leftover-box 8. Do not leftover-box make leftover-box leftover-box unexpand -t 4 leftover-box required.

Optional extra: leftover-box a leftover-box tiny leftover-box leftover-box home leftover-box file leftover-box then leftover-box unexpand -a ~/practice-note.txt if leftover-box you leftover-box already leftover-box have leftover-box save leftover-box output to a file leftover-box or leftover-box put a short line into a leftover-box file. Do not leftover-box make leftover-box the leftover-box file leftover-box required. Night one leftover-box can leftover-box stay leftover-box on leftover-box leftover-box printf 'a\tb\tc\n' | expand | unexpand -a.

Optional extra: leftover-box unexpand leftover-box then leftover-box leftover-box head leftover-box the leftover-box first leftover-box leftover-box line:

printf 'a\tb\tc\n' | expand | unexpand -a | head -n 1

That leftover-box peek leftover-box shows leftover-box only leftover-box the leftover-box first leftover-box leftover-box unexpanded leftover-box leftover-box line. Do not leftover-box make leftover-box leftover-box head leftover-box required. Head leftover-box is leftover-box not leftover-box leftover-box tonight's leftover-box leftover-box job.

Optional leftover-box aside leftover-box (not leftover-box the leftover-box job): leftover-box peek leftover-box leftover-box tabs leftover-box as leftover-box ^I leftover-box with leftover-box leftover-box printf 'a\tb\tc\n' | expand | unexpand -a | cat -A leftover-box or leftover-box leftover-box cat -T. Keep leftover-box that leftover-box optional. Skip leftover-box cat -A leftover-box / leftover-box leftover-box cat -T as leftover-box the leftover-box main leftover-box job.

Skip leftover-box huge leftover-box dumps as leftover-box tonight's leftover-box job. Example leftover-box unexpand leftover-box of leftover-box whole leftover-box home, leftover-box or leftover-box unexpand leftover-box of leftover-box /etc leftover-box is leftover-box still leftover-box a leftover-box huge leftover-box dump. Night one is leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line, leftover-box not leftover-box a leftover-box giant leftover-box file.

Skip leftover-box unexpand leftover-box piped leftover-box into leftover-box rm as leftover-box tonight's leftover-box job. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. Rm leftover-box deletes leftover-box files. Do not leftover-box mix leftover-box those leftover-box jobs. Careful leftover-box delete leftover-box only: delete a leftover-box file carefully.

Skip leftover-box expand as tonight's leftover-box job. Expand leftover-box is leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces. That is turn leftover-box tabs into leftover-box spaces. Unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs.

Skip leftover-box fmt as tonight's leftover-box job. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box leftover-box width. That is reflow leftover-box paragraphs. Unexpand leftover-box does leftover-box not leftover-box reflow leftover-box — leftover-box it leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs.

Skip leftover-box fold as tonight's leftover-box job. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column leftover-box width. That is wrap leftover-box long lines. Unexpand leftover-box does leftover-box not leftover-box wrap.

Skip leftover-box rev as tonight's leftover-box job. Rev leftover-box reverses leftover-box CHARACTERS leftover-box on leftover-box each leftover-box line. That is reverse leftover-box characters.

Skip leftover-box tac as tonight's leftover-box job. Tac leftover-box reverses leftover-box LINE leftover-box order. That is reverse leftover-box lines.

Skip leftover-box shuf as tonight's leftover-box job. That is mix leftover-box lines.

Skip leftover-box seq as tonight's leftover-box job. That is print a leftover-box number list.

Skip leftover-box yes as tonight's leftover-box job. That is repeat a leftover-box line until you stop.

Skip leftover-box echo as tonight's leftover-box job. Echo prints leftover-box words you type once. That is put a short line into a leftover-box file. Tonight leftover-box uses leftover-box echo leftover-box or leftover-box leftover-box printf only leftover-box as leftover-box input leftover-box to leftover-box unexpand.

Skip leftover-box sort as tonight's leftover-box job. That is put leftover-box lines in order.

Skip leftover-box nl as tonight's leftover-box job. That is number leftover-box lines.

Skip leftover-box tr as tonight's leftover-box job. That is change leftover-box characters.

Skip leftover-box cut as tonight's job. That is pull one leftover-box column.

Skip leftover-box paste as tonight's job. That is join leftover-box columns side by side.

Skip leftover-box tail as tonight's leftover-box job. That is see the end of a leftover-box file.

Skip leftover-box cat as tonight's leftover-box job. That is read a leftover-box file without opening the editor.

Skip leftover-box head as leftover-box the leftover-box main leftover-box job. That is see the start of a leftover-box file.

Skip leftover-box pipe as leftover-box the leftover-box main leftover-box job. Pipe leftover-box is leftover-box only leftover-box the leftover-box send. That is send leftover-box output into another command.

Skip leftover-box uniq as tonight's leftover-box job. That is drop leftover-box duplicate lines.

Skip leftover-box clear as tonight's leftover-box job. That is clear the leftover-box window.

Skip leftover-box watch as tonight's leftover-box job. That is see leftover-box change without typing again.

Skip leftover-box tput as tonight's leftover-box job. That is see leftover-box terminal columns and colors.

Skip leftover-box reset as tonight's leftover-box job. That is fix a garbled leftover-box terminal.

Skip leftover-box stty as tonight's leftover-box job. That is see leftover-box window size.

Skip leftover-box tty as tonight's job. That is see leftover-box terminal name.

Skip leftover-box less as tonight's job. That is read a leftover-box file one screen at a time.

Skip leftover-box wc as tonight's job. That is see how long a leftover-box file is.

Skip leftover-box timeout as tonight's job. That is stop a leftover-box command after a few seconds.

Skip leftover-box time as tonight's job. That is see how long a leftover-box command took.

Skip leftover-box date as tonight's job. That is see what time the leftover box thinks it is.

Skip leftover-box cal as tonight's job. That is see leftover-box month on a leftover-box calendar.

Skip leftover-box pwd as tonight's job. That is see which leftover-box folder you are in.

Skip leftover-box screen, leftover-box tmux, leftover-box script, leftover-box mesg, leftover-box wall, and leftover-box write as tonight's leftover-box job.

Skip leftover-box password login off as tonight. That is turn off leftover-box password login once the key works.

Skip leftover-box zip, tar, gzip, unzip, leftover-box du, leftover-box ping, and leftover-box curl as tonight's job. Those leftover-box pages already exist.

Skip leftover-box apt as leftover-box tonight's leftover-box job. The leftover-box coreutils leftover-box aside leftover-box is leftover-box not leftover-box the leftover-box lesson.

Skip htop, top, Grafana, a monitoring box, and a NAS. Skip leftover-box screen, leftover-box tmux, leftover-box script, leftover-box mesg, leftover-box wall, leftover-box write, nohup, ps, kill, kill -9, jobs, and pkill as tonight.

Skip leftover-box files under /etc, leftover-box whole leftover-box /, SSH folders, leftover-box /dev as a leftover-box dump, other disks, USB sticks, and /srv as tonight's lesson. Practice only in home. Unexpand does not need leftover-box /etc or leftover-box / as leftover-box a leftover-box dump on night one.

What this is not

This is not leftover-box expand. Expand leftover-box turns leftover-box leftover-box tabs leftover-box into leftover-box leftover-box spaces. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That is turn leftover-box tabs into leftover-box spaces. Skip leftover-box expand as tonight's job — leftover-box expand exists. It is not leftover-box fmt. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box leftover-box width. Unexpand leftover-box does leftover-box not leftover-box reflow leftover-box paragraphs. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. That is reflow leftover-box paragraphs. It is not leftover-box fold. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column leftover-box width leftover-box (leftover-box can leftover-box split leftover-box a leftover-box word). Unexpand leftover-box does leftover-box not leftover-box wrap. That is wrap leftover-box long lines. It is not leftover-box tr. Tr leftover-box changes leftover-box characters leftover-box to leftover-box other leftover-box characters. Unexpand leftover-box is leftover-box specifically leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs leftover-box at leftover-box leftover-box tab leftover-box stops. That is change leftover-box characters. It is not leftover-box cut. That is pull one leftover-box column. It is not leftover-box paste. That is join leftover-box columns side by side. It is not leftover-box column. Skip leftover-box column as leftover-box tonight's leftover-box job — leftover-box that leftover-box is line leftover-box lists up in leftover-box columns. Column leftover-box exists. It is not leftover-box rev. Rev leftover-box reverses leftover-box CHARACTERS leftover-box on leftover-box each leftover-box line. That is reverse leftover-box characters. It is not leftover-box tac. Tac leftover-box reverses leftover-box LINE leftover-box order (leftover-box last leftover-box line leftover-box first). That is reverse leftover-box lines. It is not leftover-box shuf. That is mix leftover-box lines. It is not leftover-box seq as leftover-box the leftover-box job. That is print a leftover-box number list. It is not leftover-box yes. That is repeat a leftover-box line until you stop. It is not leftover-box echo as leftover-box the leftover-box job. That is put a short line into a leftover-box file. Tonight leftover-box uses leftover-box echo leftover-box or leftover-box leftover-box printf only leftover-box as leftover-box input leftover-box to leftover-box unexpand. It is not leftover-box sort. That is put leftover-box lines in order. It is not leftover-box tail. That is see the end of a leftover-box file. It is not leftover-box cat. That is read a leftover-box file without opening the editor. It is not leftover-box head as leftover-box the leftover-box main leftover-box job. That is see the start of a leftover-box file. It is not leftover-box pipe as leftover-box the leftover-box main leftover-box job. That is send leftover-box output into another command. It is not leftover-box uniq. That is drop leftover-box duplicate lines. It is not leftover-box nl. That is number leftover-box lines. It is not leftover-box clear. That is clear the leftover-box window. It is not leftover-box watch. That is see leftover-box change without typing again. It is not leftover-box tput. That is see leftover-box terminal columns and colors. It is not leftover-box reset. That is fix a garbled leftover-box terminal. It is not leftover-box stty size. That is see leftover-box window size. It is not leftover-box tty. That is see leftover-box terminal name. It is not leftover-box less. That is read a leftover-box file one screen at a time. It is not leftover-box wc. That is see how long a leftover-box file is. It is not leftover-box timeout. That is stop a leftover-box command after a few seconds. It is not leftover-box time. That is see how long a leftover-box command took. It is not leftover-box date. That is see what time the leftover box thinks it is. It is not leftover-box cal. That is see leftover-box month on a leftover-box calendar. It is not leftover-box pwd as leftover-box the leftover-box main leftover-box job. That is see which leftover-box folder you are in. It is not leftover-box password login off. That is turn off leftover-box password login once the key works. It is not leftover-box screen, leftover-box tmux, leftover-box script, leftover-box mesg, leftover-box wall, or leftover-box write as the leftover-box job. It is not leftover-box huge leftover-box dumps as leftover-box the leftover-box job. It is not leftover-box unexpand leftover-box piped leftover-box into leftover-box rm. It is not leftover-box apt as leftover-box the leftover-box job. It is not a careful leftover-box delete. That is delete a leftover-box file carefully. It is not leftover-box extra leftover-box system software, leftover-box YubiKey, leftover-box camera, a monitoring app, htop, Grafana, or a NAS. It is not leftover-box /etc or leftover-box whole leftover-box /. It is not opening SSH to the internet so you can leftover-box turn leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs from a coffee shop. That is keep the leftover box on the house network. Do not forward port 22.

What next

Need leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces? Turn leftover-box tabs into leftover-box spaces (expand leftover-box turns leftover-box leftover-box tabs leftover-box into leftover-box leftover-box spaces; leftover-box unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs). Need leftover-box reflow leftover-box paragraphs leftover-box to leftover-box a leftover-box leftover-box width? Reflow leftover-box paragraphs (fmt leftover-box reflows leftover-box paragraphs; leftover-box unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs). Need leftover-box hard leftover-box wrap leftover-box at leftover-box a leftover-box column? Wrap leftover-box long lines (fold leftover-box hard-wraps leftover-box at leftover-box a leftover-box column; leftover-box unexpand leftover-box does leftover-box not leftover-box wrap). Need leftover-box last leftover-box letter leftover-box first leftover-box on leftover-box each leftover-box line? Reverse leftover-box characters. Need leftover-box last leftover-box line leftover-box first? Reverse leftover-box lines. Need leftover-box mixed leftover-box lines? Mix leftover-box lines. Need leftover-box number leftover-box list leftover-box in leftover-box order? Print a leftover-box number list. Need leftover-box repeating leftover-box line? Repeat a leftover-box line until you stop. Need leftover-box change leftover-box characters leftover-box to leftover-box other leftover-box characters? Change leftover-box characters (tr leftover-box swaps leftover-box or leftover-box deletes; leftover-box unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs). Need leftover-box words you type once? Put a short line into a leftover-box file. Need leftover-box send leftover-box as leftover-box the leftover-box lesson? Send leftover-box output into another command. Need leftover-box practice files gone? Delete a leftover-box file carefully. Need leftover-box pretty leftover-box leftover-box columns? Line leftover-box lists up in leftover-box columns (column leftover-box lines leftover-box leftover-box lists leftover-box up leftover-box in leftover-box leftover-box columns; leftover-box unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs). When key login is boring on every computer you use, turn off leftover-box password login once the key works. Keep SSH on the house network: keep the leftover box on the house network. Do not forward port 22.

Skip

• Skip if SSH still fails. Finish SSH from the couch first.
• Skip leftover-box huge leftover-box dumps as leftover-box tonight's leftover-box job. Night one is leftover-box one leftover-box short leftover-box leftover-box practice leftover-box line.
• Skip leftover-box unexpand leftover-box piped leftover-box into leftover-box rm as leftover-box tonight's leftover-box job. Unexpand leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs. Do not leftover-box mix leftover-box delete leftover-box into leftover-box this leftover-box drill.
• Skip leftover-box expand as tonight's job. Expand leftover-box is leftover-box leftover-box tabs leftover-box to leftover-box leftover-box spaces. That is turn leftover-box tabs into leftover-box spaces. Unexpand leftover-box is leftover-box leftover-box spaces leftover-box to leftover-box leftover-box tabs.
• Skip leftover-box fmt as tonight's job. Fmt leftover-box reflows leftover-box paragraphs leftover-box to leftover-box fill leftover-box a leftover-box leftover-box width: reflow leftover-box paragraphs. Unexpand leftover-box does leftover-box not leftover-box reflow leftover-box — leftover-box it leftover-box turns leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs.
• Skip leftover-box fold as tonight's job. Fold leftover-box hard-wraps leftover-box lines leftover-box at leftover-box a leftover-box column leftover-box width: wrap leftover-box long lines. Unexpand leftover-box does leftover-box not leftover-box wrap.
• Skip leftover-box tr as tonight's job. That is change leftover-box characters.
• Skip leftover-box cut as tonight's job. That is pull one leftover-box column.
• Skip leftover-box paste as tonight's job. That is join leftover-box columns side by side.
• Skip leftover-box column as tonight's job. Pretty leftover-box leftover-box columns leftover-box is leftover-box not leftover-box leftover-box tonight — leftover-box that leftover-box is line leftover-box lists up in leftover-box columns. Column leftover-box exists.
• Skip leftover-box rev as tonight's job. That is reverse leftover-box characters.
• Skip leftover-box tac as tonight's job. That is reverse leftover-box lines.
• Skip leftover-box shuf as tonight's job. That is mix leftover-box lines.
• Skip leftover-box seq as tonight's job. That is print a leftover-box number list.
• Skip leftover-box yes as tonight's job. That is repeat a leftover-box line until you stop.
• Skip leftover-box echo as tonight's job. Echo prints leftover-box words you type once: put a short line into a leftover-box file. Tonight leftover-box uses leftover-box echo leftover-box or leftover-box leftover-box printf only leftover-box as leftover-box input leftover-box to leftover-box unexpand.
• Skip leftover-box sort as tonight's job. That is put leftover-box lines in order.
• Skip leftover-box nl as tonight's job. That is number leftover-box lines.
• Skip leftover-box tail as tonight's job. That is see the end of a leftover-box file.
• Skip leftover-box cat as tonight's leftover-box job. That is read a leftover-box file without opening the editor. Optional leftover-box aside: leftover-box cat -A leftover-box / leftover-box leftover-box cat -T leftover-box to leftover-box peek leftover-box leftover-box tabs leftover-box as leftover-box ^I leftover-box is leftover-box OK leftover-box if leftover-box you leftover-box keep leftover-box it leftover-box optional. Skip leftover-box that leftover-box as leftover-box the leftover-box main leftover-box job.
• Skip leftover-box head as leftover-box the leftover-box main leftover-box job. That is see the start of a leftover-box file.
• Skip leftover-box pipe as leftover-box the leftover-box main leftover-box job. Pipe leftover-box is leftover-box only leftover-box the leftover-box send: send leftover-box output into another command.
• Skip leftover-box uniq as tonight's job. That is drop leftover-box duplicate lines.
• Skip leftover-box clear as tonight's job. That is clear the leftover-box window.
• Skip leftover-box watch as tonight's job. That is see leftover-box change without typing again.
• Skip leftover-box tput as tonight's job. That is see leftover-box terminal columns and colors.
• Skip leftover-box reset as tonight's job. That is fix a garbled leftover-box terminal.
• Skip leftover-box stty as tonight's job. That is see leftover-box window size.
• Skip leftover-box tty as tonight's job. That is see leftover-box terminal name.
• Skip leftover-box less as tonight's job. That is read a leftover-box file one screen at a time.
• Skip leftover-box wc as tonight's job. That is see how long a leftover-box file is.
• Skip leftover-box timeout as tonight's job. That is stop a leftover-box command after a few seconds.
• Skip leftover-box time as tonight's job. That is see how long a leftover-box command took.
• Skip leftover-box date as tonight's job. That is see what time the leftover box thinks it is.
• Skip leftover-box cal as tonight's job. That is see leftover-box month on a leftover-box calendar.
• Skip leftover-box pwd as tonight's job. That is see which leftover-box folder you are in.
• Skip leftover-box screen, leftover-box tmux, leftover-box script, leftover-box mesg, leftover-box wall, and leftover-box write as tonight's leftover-box job.
• Skip leftover-box password login off as tonight. That is turn off leftover-box password login once the key works.
• Skip leftover-box zip, tar, gzip, unzip, leftover-box du, leftover-box ping, and leftover-box curl as tonight's job.
• Skip leftover-box apt as leftover-box tonight's leftover-box job. The leftover-box coreutils leftover-box aside leftover-box is leftover-box not leftover-box the leftover-box lesson.
• Skip htop, top, Grafana, a monitoring box, and a NAS.
• Skip leftover-box files under /etc, leftover-box whole leftover-box /, SSH folders, leftover-box /dev as a leftover-box dump, other disks, USB sticks, and /srv as tonight's lesson. Practice only in home. Unexpand does not need leftover-box /etc or leftover-box whole leftover-box / as leftover-box a leftover-box dump on night one.
• Skip rm -rf. Careful leftover-box delete only: delete a leftover-box file carefully.
• Skip opening SSH to the internet so you can leftover-box turn leftover-box leftover-box spaces leftover-box into leftover-box leftover-box tabs from a coffee shop. That is keep the leftover box on the house network. Do not forward port 22.