Causes sed to read its program from the file named program-file instead of from the command line. You can use this option more than once on the command line.
Edits files in place. Without this option sed sends its output to standard output. With this option sed replaces the file it is processing with its output. When you specify a suffix, sed makes a backup of the original file. This backup has the original filename with suffix appended. You must include a period in suffix if you want a period to appear between the original filename and suffix.
Summarizes how to use sed.
Causes sed not to copy lines to standard output except as specified by the Print (p) instruction or flag.