Script: Sed: Search And Replace

Basic sed search and replace line:

sed "s/$FIND/$REPLACE/g" $inputfile > /tmp/outputfile

Code line to make email adresses unusable by adding the extension .local to the complete email address:

sed "s/^mail.*$/&\.local/g" inputfile > outputfile

• s : substitute
• ^mail : all lines that start with mail
• .*$ : and match everything after the initial match
• & : everything that has been matched
• \.local : Add .local (\ is for escaping the '.')
• g : global