bash
Default and alternative command
Provide an alternative command if the preferred command is not available.
Cleanup a script on exit using trap
Add directory to $PATH if it doesn't exist
Check if a file ends with newline
Check if a variable is set
Check network connectivity
Elevate script to sudo
Environment variable defaults
Safe Scripts (Strict Mode)
Parallel
Run commands in parallel
Script dir and path
Get the directory and path of a script.