Bash All tips to master bash and develop useful scripts for everyday life. Tutorials Bash : automatically exit the script if a variable is not set 2022-11-12 Use the command set -u for testing variable initialization. Bash : automatically exit the script if a command fails 2022-11-12 Use the command set -e for testing the return code. How to delete the files older than a given date in bash? 2022-11-11 Rotating logs and backups: the command to clean a server.