27_bash_set_options.md

NR	Full Name	Shortcut	default	Description
01	allexport	-a	off	Export all variables to the environment when a new shell is started.
02	braceexpand	-B	on	Enable brace expansion (e.g., {a,b} expands to a b).
03	emacs	-e	on	Use Emacs-style line editing (default).
04	errexit	-e	off	Exit immediately if any command fails (also known as "set -e").
05	errtrace	-E	off	Trap errors in functions and subshells.
06	functrace	-T	off	Enable function tracing (useful for debugging).
07	hashall	-h	on	Remember the location of commands (used for faster command lookup).
08	histexpand	-H	on	Enable history expansion (e.g., !command).
09	history	-o	on	Enable command history (e.g., history -c clears history).
10	ignoreeof	-i	off	Ignore Ctrl-D (EOF) as an exit signal (useful in interactive sessions).
11	interactive-comments	-v	on	Allow comments in interactive mode (comments start with #).
12	keyword	-k	off	Mark words following = as reserved keywords (e.g., if, while).
13	monitor	-m	on	Enable job control monitoring (e.g., bg, fg, jobs).
14	noclobber	-C	off	Prevent overwriting existing files with > redirection.
15	noexec	-n	off	Read commands but do not execute them (useful for debugging).
16	noglob	-f	off	Disable pathname expansion (globbing).
17	nolog	-L	off	Disable logging of commands in the history file.
18	notify	-b	off	Notify when background jobs complete (useful with wait).
19	nounset	-u	off	Exit if unset variables are referenced (also known as "set -u").
20	onecmd	-t	off	Exit after reading and executing one command (useful for scripts).
21	physical	-P	off	Use the physical directory structure (resolve symlinks).
22	pipefail	-o	off	Exit if any command in a pipeline fails (useful for error handling).
23	posix	-o	off	Set POSIX-compatible mode (restricts some non-standard features).
24	privileged	-p	off	Run in privileged mode (e.g., sudo bash).
25	verbose	-v	off	Print shell input lines as they are read (useful for debugging).
26	vi	-o	off	Use vi-style line editing (e.g., set -o vi).
27	xtrace	-x	off	Print commands and their arguments as they are executed (also known as "set -x").