The ls command might be familiar to you if you've used Linux in the past. List is abbreviated as "ls". The most used command in Linux or Unix is "ls". The ls command is used to list a directory's contents. To simplify your life, become proficient with the "ls" command.
When dealing with LINUX, you may find yourself in a position where you need to transfer a group of files or a whole directory. In this situation, you might want to know how much disc space that directory or set of files takes up.
When working with shell in Linux & Unix, one of the most important commands is "find", which allows you to inspect all files and folders on your server. The provided lines are sent to the standard output device with this command.