Usage: sed [OPTION]… {script-only-if-no-other-script} [input-file]…
  -n, –quiet, –silent
                 suppress automatic printing of pattern space
  -e script, –expression=script
                 add the script to the commands to be executed
  -f script-file, –file=script-file
                 add the contents of script-file to the commands to be executed
  –follow-symlinks
                 follow symlinks when processing in place
  -i[SUFFIX], –in-place[=SUFFIX]
                 edit files in place (makes backup if extension supplied)
  -l N, –line-length=N
                 specify the desired line-wrap length for the `l’ command
  –posix
                 disable all GNU extensions.
  -r, –regexp-extended
                 use extended regular expressions in the script.
  -s, –separate
                 consider files as separate rather than as a single continuous