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Written 31 Aug 2026. This is a how-to, not a product card. Buy links are not tagged yet.

See leftover-box month on a leftover-box calendar

After SSH works, see leftover-box month on a leftover-box calendar with cal so leftover-box dates make sense on a leftover-box grid. You do not need a calendar app for this.

See what time the leftover box thinks it is read leftover-box clock with leftover-box date. Tonight is leftover-box month grid: leftover-box cal. You are still only practicing in home. The leftover box does not need a calendar app, 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 you only need leftover-box date (clock read), that is see what time the leftover box thinks it is. Date reads leftover-box clock. Leftover-box cal prints leftover-box month as a leftover-box grid. If leftover-box time is what you want (how long a leftover-box command took), that is see how long a leftover-box command took. If leftover-box timeout is what you want (stop after a few leftover-box seconds), that is stop a leftover-box command after a few seconds. If leftover-box watch is what you want (re-run until Ctrl+C), that is see leftover-box change without typing again. Skip this whole note if you only need leftover-box clock zone. That is set the leftover box clock to your house. Zone sets the city. Cal prints leftover-box month. If the leftover laptop lid is putting the leftover box to sleep, that is don't let the leftover laptop sleep. That is leftover-box lid sleep, not leftover-box cal. Skip leftover-box how long leftover-box has been awake. That is see how long the leftover box has been awake. Skip leftover-box systemd leftover-box timers. That is see what the leftover box already runs on a schedule. Skip leftover-box file date. That is see leftover-box file size, date, and permissions. File date is not leftover-box calendar.

What this is

cal means print leftover-box month as a leftover-box calendar grid. You type leftover-box cal. The leftover box prints leftover-box month, leftover-box days, and leftover-box week rows. That is leftover-box month look. It is not leftover-box date. Date reads leftover-box clock. That is see what time the leftover box thinks it is. It is not leftover-box time. Time measures how long a leftover-box command took. That is see how long a leftover-box command took. It is not leftover-box timeout. Timeout stops. That is stop a leftover-box command after a few seconds. It is not leftover-box watch. Watch re-runs until Ctrl+C. That is see leftover-box change without typing again. It is not leftover-box clock zone. Zone sets the city with leftover-box timedatectl. That is set the leftover box clock to your house. It is not leftover-box lid sleep on a leftover laptop. That is don't let the leftover laptop sleep. It is not leftover-box file date. That is see leftover-box file size, date, and permissions. It is not how long the leftover box has been awake. That is see how long the leftover box has been awake. It is not leftover-box systemd leftover-box timers. That is see what the leftover box already runs on a schedule.

Practice leftover-box cal 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 ~

Ask the leftover box for leftover-box month as a leftover-box grid:

cal

The leftover box should print leftover-box month as a leftover-box grid. Read it once. That is enough for night one. Practice only in home.

Debian and Ubuntu leftover-box often already have leftover-box cal (leftover-box ncal package). If leftover-box cal is missing, leftover-box sudo apt install ncal is the small leftover-box package. Night one can stop at leftover-box cal. Do not make leftover-box apt the leftover-box job.

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: this leftover-box month plus leftover-box neighbors with leftover-box -3:

cal -3

That prints leftover-box last month, this leftover-box month, and leftover-box next month. Night one can stay with plain leftover-box cal.

Optional: leftover-box year grid:

cal 2026

That prints leftover-box year as leftover-box month grids. One leftover-box year is fine. Skip leftover-box huge leftover-box year dumps as night one if it floods the leftover-box screen.

Skip leftover-box ncal as tonight's job. Ncal is leftover-box weeks-on-the-left leftover-box calendar, not leftover-box cal month grid.

Skip leftover-box calendar holiday leftover-box files as tonight.

Skip leftover-box cal -j leftover-box Julian leftover-box day as night one.

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

Skip leftover-box date -s and leftover-box setting the leftover-box clock by hand as tonight.

Skip leftover-box clock zone as tonight. That is set the leftover box clock to your house. Do not run leftover-box timedatectl set-timezone as tonight's job.

Skip leftover-box NTP, leftover-box BIOS clock, leftover-box RTC, and leftover-box hwclock as tonight.

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

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

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

Skip leftover-box how long leftover-box has been awake as tonight. That is see how long the leftover box has been awake.

Skip leftover-box lid sleep as tonight. That is don't let the leftover laptop sleep.

Skip leftover-box file date as tonight. That is see leftover-box file size, date, and permissions.

Skip leftover-box systemd leftover-box timers as tonight. That is see what the leftover box already runs on a schedule.

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

Skip leftover-box files under /etc, SSH folders, other disks, USB sticks, and /srv as tonight's lesson. Practice only in home.

What this is not

This is not leftover-box date. Date reads leftover-box clock. Cal prints leftover-box month grid. That is see what time the leftover box thinks it is. It is not leftover-box time. Time measures leftover-box duration. That is see how long a leftover-box command took. It is not leftover-box timeout. Timeout stops. That is stop a leftover-box command after a few seconds. It is not leftover-box watch. Watch re-runs until Ctrl+C. That is see leftover-box change without typing again. It is not leftover-box clock zone. That is set the leftover box clock to your house. It is not leftover-box lid sleep on a leftover laptop. That is don't let the leftover laptop sleep. It is not leftover-box file date. That is see leftover-box file size, date, and permissions. It is not how long the leftover box has been awake. That is see how long the leftover box has been awake. It is not leftover-box systemd leftover-box timers. That is see what the leftover box already runs on a schedule. It is not leftover-box ping as the leftover-box job. That is check that the leftover box can reach the house router. It is not leftover-box curl as the leftover-box job. That is download a file onto the leftover box. It is not a careful leftover-box delete. That is delete a leftover-box file carefully. It is not a monitoring app, htop, Grafana, or a NAS. It is not opening SSH to the internet so you can read leftover-box month from a coffee shop. That is keep the leftover box on the house network. Do not forward port 22.

What next

Need leftover-box date (clock)? See what time the leftover box thinks it is. Need leftover-box clock zone? Set the leftover box clock to your house. Need leftover-box time (duration)? See how long a leftover-box command took. Need leftover-box timeout? Stop a leftover-box command after a few seconds. Need leftover-box watch? See leftover-box change without typing again. Need leftover-box uptime? See how long the leftover box has been awake. Need leftover-box lid sleep? Don't let the leftover laptop sleep. Need leftover-box file date? See leftover-box file size, date, and permissions. Need leftover-box practice files gone? Delete a leftover-box file carefully. 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

Sources

Debian: cal(1). Ubuntu: cal(1). Official pages only. For leftover-box date, see see what time the leftover box thinks it is. For leftover-box clock zone, see set the leftover box clock to your house. For leftover-box time, see see how long a leftover-box command took. For the login, see SSH from the couch.

Also on this topic

SSH from the couchType commands on the leftover box from your laptop, on the house network. Password login first. Do not open this to the internet. See what time the leftover box thinks it isAfter SSH works, see what time the leftover box thinks it is with date so logs and backups make sense. You do not need a clock app for this. See how long a leftover-box command tookAfter SSH works, see how long a leftover-box command took with time so you know if it was a few seconds. You do not need a monitoring app for this. Stop a leftover-box command after a few secondsAfter SSH works, stop a leftover-box command after a few seconds with timeout so it does not hang. You do not need a monitoring app for this. See leftover-box change without typing againAfter SSH works, re-run a leftover-box command every few seconds with watch so leftover-box size (or leftover-box clock) updates by itself. You do not need a monitoring app for this. Set the leftover box clock to your houseLogs, updates, and weekly backups only make sense if the leftover box uses your local time. timedatectl sets the city zone. The box keeps the clock correct over the network. See how long the leftover box has been awakeBefore you buy a UPS or a new mini PC, see how long the leftover box has been awake. Don't let the leftover laptop sleepClose the lid. The leftover laptop has to stay awake so SSH and Pi-hole keep working. A leftover desktop can skip this note. See what the leftover box already runs on a scheduleBefore you add a weekly backup or buy a monitoring box, look at the leftover box alarm clocks. See leftover-box file size, date, and permissionsAfter SSH works, look at one leftover-box file with stat so you can see its size, last-change date, and permissions without opening it. You do not need a file manager app for this. Delete a leftover-box file carefullyAfter SSH works, delete one leftover-box file with rm -i. Ask first. Skip rm -rf. You do not need a NAS for this. Turn off leftover-box password login once the key worksAfter the laptop key login is boring, tell SSH to stop accepting the leftover-box password. The key is how you get in. A keyboard on the leftover box is the backup now. Keep the leftover box on the house networkSSH and Pi-hole belong on the house network. Skip this if you never opened the router settings. Do not forward port 22.