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Linux Consolen Commandos
DESCRIPTION
Bash is an sh-compatible command language interpreter that executes commands read from the standard input or from
a file. Bash also incorporates useful features from the Korn and C shells (ksh and csh).
OPTIONS
In addition to the single-character shell options documented in the description of the set builtin command, bash
interprets the following options when it is invoked:
-c string If the -c option is present, then commands are read from string. If there are arguments after the
string, they are assigned to the positional parameters, starting with $0.
-i If the -i option is present, the shell is interactive.
-l Make bash act as if it had been invoked as a login shell (see INVOCATION below).
-r If the -r option is present, the shell becomes restricted (see RESTRICTED SHELL below).
-s If the -s option is present, or if no arguments remain after option processing, then commands are read
from the standard input. This option allows the positional parameters to be set when invoking an inter
active shell.
-v Print shell input lines as they are read.
-x Print commands and their arguments as they are executed.
-D A list of all double-quoted strings preceded by $ is printed on the standard ouput. These are the
strings that are subject to language translation when the current locale is not C or POSIX. This
implies the -n option; no commands will be executed.
[-+]O [shopt_option]
shopt_option is one of the shell options accepted by the shopt builtin (see SHELL BUILTIN COMMANDS
below). If shopt_option is present, -O sets the value of that option; +O unsets it. If shopt_option is
not supplied, the names and values of the shell options accepted by shopt are printed on the standard
output. If the invocation option is +O, the output is displayed in a format that may be reused as
input.
-- A -- signals the end of options and disables further option processing. Any arguments after the -- are
treated as filenames and arguments. An argument of - is equivalent to --.
Bash also interprets a number of multi-character options. These options must appear on the command line before
the single-character options to be recognized.
--dump-po-strings
Equivalent to -D, but the output is in the GNU gettext po (portable object) file format.
--dump-strings
Equivalent to -D.
--help Display a usage message on standard output and exit successfully.
--init-file file
--rcfile file
Execute commands from file instead of the standard personal initialization file ~/.bashrc if the shell is
interactive (see INVOCATION below).
--login
Equivalent to -l.
--noediting
Do not use the GNU readline library to read command lines when the shell is interactive.
--noprofile
Do not read either the system-wide startup file /etc/profile or any of the personal initialization files
~/.bash_profile, ~/.bash_login, or ~/.profile. By default, bash reads these files when it is invoked as a
login shell (see INVOCATION below).
--norc Do not read and execute the personal initialization file ~/.bashrc if the shell is interactive. This
option is on by default if the shell is invoked as sh.
--posix
Change the behavior of bash where the default operation differs from the POSIX 1003.2 standard to match the
standard (posix mode).
--restricted
The shell becomes restricted (see RESTRICTED SHELL below).
--verbose
Equivalent to -v.
--version
Show version information for this instance of bash on the standard output and exit successfully.