Liste de builtin Bash et comment les utiliser

Celle que je retiens à force d'en avoir besoin:

# Positional arguments
$0 $1 $2 ... 

# All arguments as an array
$@

# Return code of the last command
$? 

# Print each script line as it is executed (debug) 
set -x

# Exit the script immediately if a command return an error (CI/CD) 
set -e