lk/basics/at.md

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---
title: "at"
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tags: [ "Documentation", "Basics" ]
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---
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Install with:
```bash
sudo apt install at
```
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Enable the daemon service with:
```bash
sudo systemctl enable --now atd
```
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Then jobs can be specified with absolute time, such as:
```bash
at 16:20
```
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```bash
at noon
```
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```bash
at midnight
```
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```bash
at teatime
```
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Type in your command, e.g.:
```bash
touch /tmp/$FILE.txt
```
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The jobs can also be specified relative to the current time:
```bash
at now +15 minutes
```
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Finally, accept the jobs with ^D.
# Managing `at` Jobs
Display a list of commands to run with:
```bash
atq
```
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> 2 Sat Oct 20 16:00:00 2018 a roach-1
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This will print all pending IDs. Remove a job by the ID with:
```bash
atrm 2
```
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Check `/var/spool/atd/` to see the jobs.
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![At it again](/tapes/at.gif)
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## Automation
Automatically add a job for later, by setting the date, then using echo for the command.
```bash
t="$(date -d "2 minutes" +%R)"
echo "fortune > ~/$FILE" | at "$t"
watch cat $FILE
```
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The `$t` here outputs the day in minutes, but you could also do `t="$(date -d "2 days" +%m/%d/%Y)"`.