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.

See https://vaneyckt.io/posts/safer_bash_scripts_with_set_euxo_pipefail/