Linux and Unix bash command
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Short for Bourne-Again Shell, bash is a command interpreter.
bash
| -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. |
| -r | If the -r option is present, the shell becomes restricted. |
| -i | If the -i option is present, the shell is interactive. |
| -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 interactive 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. |
| [-+]0 [shopt_option] | shopt_option is one of the shell options accepted by the shopt builtin. 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 --. |
| --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. |
| --login | Make bash act as if it had been invoked as a login shell. |
| --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. |
| --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. |
| --verbose | Equivalent to -v. |
| --version | Show version information for this instance of bash on the standard output and exit successfully. |
bash
Execute the bash command interpreter.