Substitute first match per line sed

Replace the first occurrence of 'foo' with 'bar' per line

sed 's/foo/bar/' file.txt

#sed #linux

more sed all 15 commands →

Substitute all matches (global) sed 's/foo/bar/g' file.txt In-place edit sed -i 's/old/new/g' config.cfg In-place edit with backup sed -i.bak 's/old/new/g' file.txt Delete matching lines sed '/^#/d' config.txt Delete blank lines sed '/^[[:space:]]*$/d' file.txt