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cron PATH bit me again today (lemmy.world)

submitted 1 week ago* (last edited 1 week ago) by indidev@lemmy.world to c/programming@programming.dev

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Deployed a backup script on a new server, tested it manually — worked fine. Set up crontab, came back next morning, no backup. Turns out /usr/local/bin wasn't in cron's PATH so pg_dump just silently didn't exist.

Switched to absolute path and it worked immediately. Fifteen minutes of debugging for a one-character fix. I keep making this mistake every time I set up a new box. At this point I should just have a checklist taped to my monitor.

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[–] runwisp_com@lemmy.world 7 points 1 week ago

cron isn't using your login shell. that's the trap.

but put PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin at the top of the crontab, then test the exact command once with env -i HOME="$HOME" PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin /bin/sh -c '...', and you catch most of the "worked in my terminal" stuff before it turns into tomorrow's missing backup. MAILTO or a heartbeat catches the next failure.