linux - sed command not modifying the file

Question

This question already has answers here: question from:https://stackoverflow.com/questions/65871483/sed-command-not-modifying-the-file

Answer 1

You are right in that you understood something wrong. Sed is indeed not supposed to overwrite the input file so, as you guessed, you will have to redirect (pipe) the output to a different file, e.g.:

sed 's/fr/us/' /etc/default/keyboard > keyboard2

then move keyboard2 to /etc/default/keyboard (don't forget to make a backup copy of the original file, just in case).