File counting in a directory is a common task that many users might need to perform. It could be for administrative purposes, understanding disk usage, or organizing files in a systematic manner.

If you've had files deleted by a hacker or you've accidentally removed them, Jack Wallen shows you how to recover that missing data with a handy tool called testdisk.

In this article, you have learned what SED is, how SED works, how to replace a string in a file, how to replace a variable in a file, and how to perform the deletion. To learn more about Linux, follow ...