shopt

Manage Bash shell options: variables (stored in $BASHOPTS) that control behavior specific to the Bash shell. Generic POSIX shell variables (stored in $SHELLOPTS) are managed with the set command instead. More information: https://www.gnu.org/software/bash/manual/html_node/The-Shopt-Builtin.html.

• List of all settable options and whether they are set:

shopt

• Set an option:

shopt -s option_name

• Unset an option:

shopt -u option_name

• Print a list of all options and their status formatted as runnable shopt commands:

shopt -p

• Display help:

help shopt