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# List of shell options
![](keywords>bash shell scripting options runtime variable behaviour)
This information was taken from a Bash version \"`4.1`\", every now and
format(docs): remove escaped t's
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then new options are added, so likely, this list isn't complete.
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The shell-options can be set with the [shopt builtin
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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command](../commands/builtin/shopt.md).
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## Shell options
### autocd
Option: `autocd` Since: 4.0-alpha
------------- ------------------ ---------- -----------
Shell mode: interactive only Default: off
If set, a command name that is the name of a directory is executed as if
it were the argument to the cd command.
### assoc_expand_once
Option: `assoc_expand_once` Since: 5.0-alpha
------------- --------------------- ---------- -----------
Shell mode: all Default: off
If set, Bash attempts to expand associative array options only once.
### cdable_vars
Option: `cdable_vars` Since: unknown
------------- --------------- ---------- ---------
Shell mode: all Default: off
Treat every **non-directory argument** to the `cd`-command as variable
name containing a directory to `cd` into.
### cdspell
Option: `cdspell` Since: unknown
------------- ------------------ ---------- ---------
Shell mode: interactive only Default: off
If set, minor errors in the spelling of a directory component in a cd
command will be corrected. The errors checked for are transposed
characters, a missing character, and one character too many. If a
correction is found, the corrected file name is printed, and the command
proceeds.
### checkhash
Option: `checkhash` Since: unknown
------------- ------------- ---------- ---------
Shell mode: all Default: off
If set, Bash checks that a command found in the hash table exists before
trying to execute it. If a hashed command no longer exists, a normal
path search is performed.
### checkjobs
Option: `checkjobs` Since: 4.0-alpha
------------- ------------------ ---------- -----------
Shell mode: interactive only Default: off
If set, Bash lists the status of any stopped and running jobs before
exiting an interactive shell. If any jobs are running, this causes the
exit to be deferred until a second exit is attempted without an
intervening command. The shell always postpones exiting if any jobs are
stopped.
### checkwinsize
Option: `checkwinsize` Since: unknown
------------- ---------------- ---------- ---------
Shell mode: all Default: on
If set, Bash checks the window size after each command and, if
necessary, updates the values of the variables
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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[LINES](../syntax/shellvars.md#LINES) and
[COLUMNS](../syntax/shellvars.md#COLUMNS).
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### cmdhist
Option: `cmdhist` Since: unknown
------------- ----------- ---------- ---------
Shell mode: all Default: off
If set, Bash attempts to save all lines of a multiple-line command in
the same history entry. This allows easy re-editing of multi-line
commands.
### compat31
Option: `compat31` Since: 3.2
------------- ------------ ---------- -----
Shell mode: all Default: off
Compatiblity mode for Bash 3.1
### compat32
Option: `compat32` Since: 4.0
------------- ------------ ---------- -----
Shell mode: all Default: off
Compatiblity mode for Bash 3.2
### compat40
Option: `compat40` Since: 4.1-beta
------------- ------------ ---------- ----------
Shell mode: all Default: off
Compatiblity mode for Bash 4.0
### compat41
Option: `compat41` Since: 4.2-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
Compatiblity mode for Bash 4.1
### compat42
Option: `compat42` Since: 4.3-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
Compatiblity mode for Bash 4.2
### compat43
Option: `compat43` Since: 4.4-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
Compatiblity mode for Bash 4.3
### compat44
Option: `compat44` Since: 5.0-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
Compatiblity mode for Bash 4.4
### direxpand
Option: `direxpand` Since: 4.3-alpha
------------- ------------- ---------- ------------------------------------------------------------------------
Shell mode: all Default: off (unless changed on compile-time with `--enable-direxpand-default`)
If set, bash replaces directory names with the results of word expansion
when performing filename completion. This changes the contents of the
readline editing buffer. If not set, bash attempts to preserve what the
user typed.
### dirspell
Option: `dirspell` Since: 4.0-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
If set, Bash will perform spelling corrections on directory names to
match a glob.
### dotglob
Option: `dotglob` Since: unknown
------------- ----------- ---------- ---------
Shell mode: all Default: off
If set, Bash includes filenames beginning with a `.` (dot) in the
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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results of [pathname expansion](../syntax/expansion/globs.md).
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### execfail
Option: `execfail` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: non-interactive Default: off
If set, a non-interactive shell will not exit if it cannot execute the
file specified as an argument to the `exec`-builtin command. An
interactive shell does not exit if `exec` fails.
### expand_aliases
Option: `expand_aliases` Since: unknown
------------- ------------------ ---------- -----------------------------------------
Shell mode: all Default: on (interactive), off (non-interactive)
If set, aliases are expanded. This option is enabled by default for
interactive shells.
### extdebug
Option: `extdebug` Since: 3.0-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
If set, behavior intended for use by debuggers is enabled.
### extglob
Option: `extglob` Since: 2.02-alpha1
------------- ----------- ---------- -------------
Shell mode: all Default: off
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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If set, the extended [pattern matching](../syntax/pattern.md) features are
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enabled. See the important note below under [Parser
configurations](#parser_configurations).
### extquote
Option: `extquote` Since: 3.0-alpha (?)
------------- ------------ ---------- ---------------
Shell mode: all Default: on
If set, `$'string'` and `$"string"` quoting is performed within
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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[parameter expansions](../syntax/pe.md) enclosed in double quotes. See the
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important note below under [Parser
configurations](#parser_configurations).
### failglob
Option: `failglob` Since: 3.0-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
If set, patterns which fail to match filenames during pathname expansion
result in an error message.
### force_fignore
Option: `force_fignore` Since: 3.0-alpha
------------- ----------------- ---------- -----------
Shell mode: interactive Default: on
If set, the suffixes specified by the
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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[FIGNORE](../syntax/shellvars.md#FIGNORE) shell variable cause words to be
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ignored when performing word completion even if the ignored words are
the only possible completions. This option is enabled by default.
### globasciiranges
Option: `globasciiranges` Since: 4.3-alpha
------------- ------------------- ---------- -----------------------------------
Shell mode: all Default: on (configurable at compile time)
If set, range expressions used in pattern matching behave as if in the
traditional C locale when performing comparisons. That is, the current
format(docs): remove escaped 's character pairs
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locale's collating sequence is not taken into account, so b will not
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collate between A and B, and upper-case and lower-case ASCII characters
will collate together.
### globstar
Option: `globstar` Since: 4.0-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
If set, recursive globbing with `**` is enabled.
### gnu_errfmt
Option: `gnu_errfmt` Since: 3.0-alpha
------------- -------------- ---------- -----------
Shell mode: all Default: off
If set, shell error messages are written in the \"standard GNU error
message format\".
### histappend
Option: `histappend` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: interactive (?) Default: off
If set, the history list is appended to the file named by the value of
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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the [HISTFILE](../syntax/shellvars.md#HISTFILE) variable when the shell
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exits, rather than overwriting the file.
### histreedit
Option: `histreedit` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: interactive (?) Default: off
If set, and readline is being used, a user is given the opportunity to
re-edit a failed history substitution.
### histverify
Option: `histverify` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: interactive (?) Default: off
Allow to review a history substitution result by loading the resulting
line into the editing buffer, rather than directly executing it.
### hostcomplete
Option: `hostcomplete` Since: 2.0-alpha3
------------- ----------------- ---------- ------------
Shell mode: interactive (?) Default: on
If set, Bash completion also completes hostnames. On by default.
### huponexit
Option: `huponexit` Since: 2.02-alpha1
------------- ------------------- ---------- -------------
Shell mode: interactive login Default: off
If set, Bash will send the `SIGHUP` signal to all jobs when an
interactive login shell exits.
### interactive_comments
Option: `interactive_comments` Since: unknown
------------- ------------------------ ---------- ---------
Shell mode: interactive Default: on
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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Allow [commenting](../scripting/basics.md#comments) in interactive shells, on
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by default.
### lastpipe
Option: `lastpipe` Since: 4.2-alpha
------------- ------------ ---------- -----------
Shell mode: all Default: off
If set, **and job control is not active**, the shell runs the last
command of a pipeline not executed in the background in the current
shell environment.
### lithist
Option: `lithist` Since: unknown
------------- ------------- ---------- ---------
Shell mode: interactive Default: off
If set, and the [#cmdhist](#cmdhist) option is enabled, multi-line
commands are saved to the history with embedded newlines rather than
using semicolon separators where possible.
### localvar_inherit
Option: `localvar_inherit` Since: 5.0-alpha
------------- -------------------- ---------- -----------
Shell mode: all Default: off
If this option is set, a local variable inherits the value of a variable
with the same name at the nearest preceding scope.
### login_shell
Option: `login_shell` Since: 2.05a-alpha1
------------- --------------- ---------- --------------
Shell mode: all Default: n/a
The option is set when Bash is a login shell. This is a readonly option.
### mailwarn
Option: `mailwarn` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: interactive (?) Default: off
If set, and a file that Bash is checking for mail has been accessed
since the last time it was checked, the message \"The mail in mailfile
has been read\" is displayed.
### no_empty_cmd_completion
Option: `mailwarn` Since: unknown
------------- ----------------- ---------- ---------
Shell mode: interactive (?) Default: off
If set, and readline is being used, Bash will not attempt to search the
PATH for possible completions when completion is attempted on an empty
line.
### nocaseglob
Option: `nocaseglob` Since: 2.02-alpha1
------------- -------------- ---------- -------------
Shell mode: all Default: off
If set, Bash matches filenames in a case-insensitive fashion when
performing pathname expansion.
### nocasematch
Option: `nocasematch` Since: 3.1-alpha1
------------- --------------- ---------- ------------
Shell mode: all Default: off
If set, Bash matches patterns in a case-insensitive fashion when
performing matching while executing `case` or `[[` conditional commands.
### nullglob
Option: `nullglob` Since: unknown
------------- ------------ ---------- ---------
Shell mode: all Default: off
If set, Bash allows patterns which match no files to expand to a null
string, rather than themselves.
### progcomp
Option: `progcomp` Since: 2.04-alpha1
------------- ----------------- ---------- -------------
Shell mode: interactive (?) Default: on
If set, the programmable completion facilities are enabled. This option
is enabled by default.
### promptvars
Option: `promptvars` Since: unknown
------------- -------------- ---------- ---------
Shell mode: interactive Default: on
If set, prompt strings undergo parameter expansion, command
substitution, arithmetic expansion, and quote removal after being
expanded using the prompt special sequences. This option is enabled by
default.
### restricted_shell
Option: `restricted_shell` Since: 2.03-alpha
------------- -------------------- ---------- ------------
Shell mode: interactive (?) Default: off
The option is set when Bash is a restricted shell. This is a readonly
option.
### shift_verbose
Option: `shift_verbose` Since: unknown
------------- ----------------- ---------- -----------------------
Shell mode: all Default: off, on in POSIX mode
If set, the shift builtin prints an error message when the shift count
exceeds the number of positional parameters.
### sourcepath
Option: `sourcepath` Since: unknown
------------- -------------- ---------- ---------
Shell mode: all Default: on
If set, the source builtin command uses the value of PATH to find the
directory containing the file supplied as an argument. This option is
enabled by default.
### syslog_history
Option: `syslog_history` Since: 5.0-alpha
------------- ------------------ ---------- -----------
Shell mode: unknown Default: off
If set, the shell history is sent to syslog.
This option is undocumented and available only if the shell supports
syslog.
### xpg_echo
Option: `xpg_echo` Since: 2.04-beta1
------------- ------------ ---------- ------------
Shell mode: all Default: off
If set, the `echo`-builtin command expands backslash-escape sequences by
default (POSIX, SUS, XPG).
## Parser configurations
Parser configurations change the way the Bash parser recognizes the
syntax when parsing a line. This, of course, is impossible for a line
that already was parsed.
There are two options that influence the parsing this way:
- `extglob`
- `extquote`
format(docs): remove escaped t's
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Consequence: You **can't** use the new syntax (e.g. the extended
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globbing syntax) and the command to enable it **in the same line**.
$ shopt -s extglob; echo !(*.txt) # this is the WRONG way!
-bash: syntax error near unexpected token `('
You have to configure the parser **before** a line with new syntax is
parsed:
$ shopt -s extglob # standalone - CORRECT way!
$ echo !(*.txt)
...
## See also
Fix hyperlinks of markdown pages at depth 2 find docs/ -depth 2 -name '*.md' | xargs grep '(.*/' -l | \ xargs -I{} \ sed -i '' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2.md#\3)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)\(.md\)\{0\})%(../\1/\2/\3.md)%g' \ -e 's%(/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)/\([^/#).][^/#).]*\)#\([0-9a-zA-Z_-][0-9a-zA-Z_-]*\))%(../\1/\2/\3.md#\4)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\))%](../\1.md)%g' \ -e 's%](\([^:.>)#][^:.>)#]*\)#\([^:.>)#][^:.>)#]*\))%](../\1.md#\2)%g' \ {} Related to https://github.com/flokoe/bash-hackers-wiki/issues/10
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- Internal: [shopt builtin command](../commands/builtin/shopt.md)
- Internal: [set builtin command](../commands/builtin/set.md)
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