Linux sed Basic usage12345678910111213141516171819202122# print first 30 linessed 1,30d log.log# delete first 30 linessed -e 1,30d log.log# delete 17th linessed -e 17d log.log# delete last 20 linessed -e '10,$d' log.log# delete last 20 lines and backup file that named 'log.log.bak'sed -e '10,$d' -i '.bak' log.log# replace StdOutsed -e 's/__variable__/__replaced__/g' file.txt# replace in filesed -e's/__variable__/__replaced__/g' -i '' file.txt Referencehttps://linux.die.net/man/1/sed Newer Javascript bundler webpack Older Setup Gitlab on Docker