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Asked: 2017-06-13 04:13:00 +0800 CST

How to send a notification using at command?

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I have a bash script that runs periodically once a day using crontab.

The script checks a condition, and if true, it should issue an at command at a specific time.

at 14:10 <notify-send hello>

The question is: how can I add a specific command like notify-send to the at command?

command-line

2 Answers

  1. Best Answer
    echo "notify-send 'hello'" | at 14:10

    at is expecting a command from STDIN.

    If you want to silence the /bin/sh warning, run it this way:

    echo "notify-send 'hello'" | at 14:10 2>/dev/null
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  2. As I was searching for a fast way to remind myself using dunstify/notify-send I want to promote @Ruslan 's comment, because it involves less typing (which is essential when you want to "just set a timer")

    at now + 3minutes <<< "notify-send -t 0 'tee is ready'"

    ... or with less whitespace/characters:

    at now+3min<<<'notify-send -t 0 tee isready'
    • -t 0 don't timeout the notification and keep it open

    and just for information: as an improvement to atq or at -l listing I use an alias that also prints the executed command, not just time/queue/user:

    alias ,atl='for j in $(atq | sort -k6,6 -k3,3M -k4,4 -k5,5 |cut -f 1); do atq |grep -P "^$j\t" ;at -c "$j" | tail -n 2; done'

    (as mentioned here in serverfault)

    * tested with Manjaro21/Debian10

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