My Sed's man outputs this:
Zero- or One- address commands = Print the current line number. a \ text Append text, which has each embedded newline preceded by a backslash. i \ text Insert text, which has each embedded newline preceded by a backslash. q [exit-code]
I was trying to figure out how to do in-place edit, and seems that the switch is
-i but I couldn't see it before because my man doesn't have its description, any clue of why?