Detect if your Script is Running in CRON

2021-06-21 · 1 min read

In my previous post I discussed how I use a wrapper script to back up a fleet of servers.

Here I will just post the part about detecting the terminal/CRON, thought this might be useful and worth putting in a separate post making it easier for crawlers to find.

1if [ ! -t 1 ]; then     # We don't have a terminal, then we are in cron
2    # Script running in cron, run without output
3else
4    # Script running interactively, use verbose output
5fi

This script is POSIX shell compliant so runs everywhere.

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Dev gone Ops gone DevOps. Any views expressed on this blog are mine alone and do not necessarily reflect the views of my employer.