Linux in a Nutshell, 6th Edition

Name

shopt

Synopsis

shopt [-opqsu] [options]

Set or unset shell options. With no options or just -p, print the option names and whether they are set or not.

Options

-o

Each option must be one of the shell option names for set -o, instead of the options listed in the next section.

-p

Print the option settings as shopt commands that can be reread later.

-q

Quiet mode. The exit status is zero if the given option is set, nonzero otherwise. With multiple options, all of them must be set for a zero exit status.

-s

Set the given options. With no options, print only those that are set.

-u

Unset the given options. With no options, print only those that are unset.

Settable shell options

The following list describes the behavior when set. Options marked with an asterisk (*) are enabled by default.

autocd

Attempt to cd to a directory that is given as a command name. Allowed in interactive shells only.

cdable_vars

Treat a nondirectory argument to cd as a variable whose value is the directory to go to.

cdspell

Attempt spelling correction on each directory component of an argument to cd. Allowed in interactive shells only.

checkhash

Check that commands found in the hash table still exist before attempting to use them. If not, perform a normal PATH search.

checkjobs

Display the status of any running or stopped jobs before exiting an interactive shell.

checkwinsize

Check the window size after each command and update LINES and COLUMNS if the size has changed.

cmdhist *

Save all lines of a multiline command in one history entry. ...