August 26, 2020

Safe Bash Scripts

Starting bash scripts with set -euxo pipefail makes them safer.

  • set -e exit immediately when a command fails.
  • set -o pipefail fail pipeline if any of the commands fail. By default the rightmost command’s exit code is used.
  • set -u treat unset variables as an error and exit immediately.
  • set -x print each command before executing.