Khal - at

Calendar Notification

at and batch read commands from standard input or a specified file which are to be executed at a later time, using /bin/sh

Topic

Usage

1. interactive provide instruction

at now + 1 hour
> here is interactive
> <Ctrl-D> to save and exit

2. direct provide instruction

at now + 1 hour <<< "notify-send 'hello-notification'"

Queue

at -q 'c' <<< echo "queue with single character only"

queue (-q)

• a: default for at
• b: batch.
• UPPER case: submitted to batch at the time of the job.

  batch processing rules with respect to load average apply

Command

1. execute command at a later time

at <time>

2. execute command at a later time from now

• count: number
• time-unit: minutes, hours, days, or weeks

at now + <count> <time-unit>

• example:

1. run script from /bin/sh after 1 minute

at now + 1minute <<< "echo \"run after a minute\" > /tmp/at_test.txt"

2. check pending job list

at -l

• or

atq

3. remove pending job list

at -r <job_number>

• or

atrm <job_number>

troubleshoot

1. Can't open /var/run/atd.pid to signal atd. No atd running?

sudo service atd start