SED Reference Table

This table provides a quick reference for commonly used sed commands.

Command	Description
`sed 's/old/new/g' file.txt`	Replace all occurrences of “old” with “new” in file.txt “error”
`sed -n '5p' file.txt`	Print only the 5th line
`sed -n '10,20p' file.txt`	Print lines 10 to 20
`sed 's/^/PREFIX: /' file.txt`	Add a prefix to each line
`sed 's/$/ SUFFIX/' file.txt`	Add a suffix to each line
`sed '3s/apple/orange/' file.txt`	Replace “apple” with “orange” only on the 3rd line
`sed '/^$/d' file.txt`	Remove all blank lines
`sed 's/[0-9]+/###/g' file.txt`	Replace all numbers with “###”
`sed 's/[a-z]/\U&/g' file.txt`	Convert lowercase to uppercase
`grep “error” file.txt	sed ’s/error/ERROR/g’`	Find “error” and replace it with “ERROR”
`awk ‘{print $2}’ file.txt	sed ’s/foo/bar/g’`	Replace “foo” with “bar” in the second column
`sed -e 's/dog/cat/g' -e 's/bird/fish/g' file.txt`	Replace multiple words in one command
`sed 's/foo/bar/g' input.txt > output.txt`	Save the changes to a new file
`sed 's/^[ ]*//' file.txt`	Remove leading spaces and tabs
`sed 's/[ ]*$//' file.txt`	Remove trailing spaces and tabs

This reference should help you quickly find the sed command you need. Happy scripting! 🎩

References