Search notes:

sed example: Comment and add a line

The following script uses curly braces to execute multiple commands when an address has matched.

First, it comments the line reading rm a-file and then adds another line (rm another-file)

sed -e '/^rm a-file/ {
  s@^@# @;
  a rm another-file
}' testfiles/script

Test file

This is the test file:

echo "This is a script"
sleep 1
rm a-file
sleep 1;
echo "script finished"