set allows you to change the values of shell options and set the positional parameters, or to display the names and values of shell variables.
set -e
The -e option will cause a bash script to exit immediately when a command fails. This is generally good as it prevents damage being caused by unexpected errors.
set -u
This option causes the bash shell to treat unset variables as an error and exit immediately. This is useful for debugging & catching typos in varible names.
Also for keeping scripts cleaner.
set -o pipefail
This particular option sets the exit code of a pipeline to that of the rightmost command to exit with a non-zero status, or to zero if all commands of the pipeline exit successfully.
This is extremely useful for stopping a script execution causing damage when the previous command in the pipe was unsuccesful.
Include the below in your next script and reap the benefits.
#!/bin/bash
set -euo pipefail
Top comments (1)
set -xfor troubleshooting