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Old 04-11-2018, 11:57 AM   #1
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TERM has become undefined in at jobs

I use a few at jobs every day. A few days ago they stopped working. I get an e-mail from at instead that reports:
Terminal type `unknown' is not defined.
at is almost a year old: it hasn't changed. My environment has TERM set.

This isn't a big deal; I'm just curious.
Old 04-11-2018, 12:48 PM   #2
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I don't know what you have. Start with
echo $TERM
Do you have that installed?
Old 04-11-2018, 12:55 PM   #3
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From the "at" man page:

For both at and batch, commands are read from standard input or the
file specified with the -f option and executed. The working directory,
the environment (except for the variables BASH_VERSINFO, DISPLAY, EUID,
GROUPS, SHELLOPTS, TERM, UID, and _) and the umask are retained from
the time of invocation.
This means it doesn't matter that you set TERM before submitting the job. The job won't inherit TERM.

The message about terminal type is likely coming from whatever you're trying to run with "at" rather than "at" itself. This suggests whatever command you're running with "at" expects a TERM variable. You might want to look at documentation for whatever that is to see if it has a flag to run without terminal - many apps have such a flag but many others don't.

You say you run several each day. If this is a regular occurrence you might want to consider scheduling cron jobs instead.
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Old 04-11-2018, 11:34 PM   #4
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The error is coming from mplayer; the noterm-osd switch didn't do the job; neither did specifying TERM as linux when it runs. I switched to play, which doesn't mind.

I use at as an alarm; though I use it most every day, I don't use it at the same times every day. cron would require editing my crontab file continuously. I use cron for everything I can automate on a fixed schedule.

Last edited by RandomTroll; 04-11-2018 at 11:37 PM. Reason: added info
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