Set or unset variables that control optional shell behavior. With no options or with -p, display the settable
Allow only options defined for the set -o built-in to be set or unset.
Display output in a form that can be reused as input.
Quiet mode. Suppress normal output.
Set (enable) each specified option. With no
optname, list all set options.
Unset (disable) each specified option. With no
optname, list all unset options.
Unless otherwise noted, options are disabled by default.
If an argument to the cd built-in is not a directory, assume that it's a variable containing the name of the directory to change to.
For interactive shells, check for minor errors in the name of a directory component (transposed characters, a missing character, or an extra character). Print the corrected name and proceed.
Check that a command found in the hash table actually exists before trying to execute it; if it is not found, do a path search.
Check the window size after each command, and update
COLUMNS as necessary.
Attempt to save all lines of a multiline command in one history entry to facilitate re-editing.
Include filenames beginning with
. in the results of pathname expansion.
For a noninteractive shell, don't exit if the file specified as an argument to exec cannot be executed. For an interactive shell, don't exit from ...