In-place edit with backup sed

Edit in-place and save original as file.txt.bak

sed -i.bak 's/old/new/g' file.txt

#sed #linux

more sed all 15 commands →

Delete matching lines sed '/^#/d' config.txt Delete blank lines sed '/^[[:space:]]*$/d' file.txt Print specific line numbers sed -n '10,20p' file.txt Print lines matching pattern sed -n '/ERROR/p' app.log Insert line before match sed '/^server_name/i # Added by deploy script' nginx.conf