How to Invoke the Bash Shell Command Interpreter With Options on Ubuntu 15.10 Wily Linux

Ubuntu Running Bash Shell with Options & Arguments

The Tutorial shows you How to Invoke a Bash Shell with Options and Arguments in Details for Ubuntu 15.10 Wily Werewolf GNU/Linux.

Bash Shell is a Command Interpreter with the main purpose of allowing you to Interact with the Computer’s Operating System.

The Bash (Bourne Again Shell) is the Default Shell environment for most GNU/Linux system.

Bash can execute commands from a Terminal, from a File, or from Standard Input.

1. Open a Shell session
   Ctrl+Alt+t to open a Terminal emulator on Desktop
   (Press “Enter” to Execute Commands)

   

2. Invoking the Bash Shell on Ubuntu.

   bash [options] [arguments]

   See below to find a List of All Options and Arguments

   Options:

   • -c str
         Reads commands from the string str.

   • -D , –dump-strings
         Output all $”…” strings contained in a Bash script.

   • -i
         Create an interactive shell. The default behavior on a terminal.

   • -l, –login
         Shell is a login one. It executes commands contained from the /etc/profile and on the first between ~/.bashrc, ~/.bash_login and ~/.profile.

   • -O option
         Enable shopt option option that set a custom shell behaviour. Use +O to unset option.

   • -p
         Start up as a privileged user. Read only the normal fixed name startup files as ~/.bashrc. Skip to import functions from the environment and ignore to read $ENV or $BASH_ENV files and BASHOPTS, CDPATH, GLOBIGNORE and SHELLOPTS variables.

   • -r, –restricted
         Create a restriced shell. A restricted shell is used to set up an environment more controlled than the standard shell.

   • -s
         Read commands from standard input. It is used to execute a local script on a remote machine.

   • –debugger
         Read the debugging profile at startup and turn on the extdebug option on shopt. The purpose of a debugger such as the BASH debugger is to allow you to see what is going on “inside” a bash script while it executes.

   • –dump-po-strings
         Output all $”…” strings like -D but in GNU gettext format.

   • –help
         Print a usage message and exit.

   • –init-file file , –rcfile file
         Use a custom startup file instead of ~/.bashrc for inter-active shells.

   • –noediting
         Do not use the readline library for input, even in an inter-active shell.

   • –noprofile
         Do not read /etc/profile or any of the personal startup files.

   • –norc
         Do not read ~/.bashrc . Enabled automatically when invoked as sh .

   • –posix
         Turn on POSIX mode.

   • –verbose
         Same as set -v; the shell prints lines as it reads them.

   • –version
         Print a version message and exit.

   • -, —
         End option processing.

   Arguments:

   Arguments are assigned in order to the positional parameters $0, $1 , $2 , etc.
   If the first argument is a script, commands are read from it, and the remaining arguments are assigned to $1 , $2 , etc.
   The name of the script is available as $0 . The script file itself need not be executable, but it must be readable.