G.2. Bash Command-Line Options

Bash itself has a number of command-line options. Here are some of the more useful ones.

• -c

  Read commands from the following string and assign any arguments to the positional parameters.

  bash$ bash -c 'set a b c d; IFS="+-;"; echo "$*"' a+b+c+d

• -r

  --restricted

  Runs the shell, or a script, in restricted mode.

• --posix

  Forces Bash to conform to POSIX mode.

• --version

  Display Bash version information and exit.

• --

  End of options. Anything further on the command line is an argument, not an option.