This is one of the most basic and useful commands. This command (“ls”) is used by a normal user or system administrator on a regular basis. This command is used to list down files and directories in the present working directory.  “ls” Command comes up with multiple options:- l This option will show file & directory permissions in rwxrwxrwx format for user, group & others This option allows you to view hidden & system files i This option gives you inode details of files s Helps you to list down file size “ls” without any options will list down all files & directories in plain text. This command gives more desired outputs after clubbing it with grep & less command that allows your filter the list or highlights the required file. This command is also compatible with input-output redirection option which is very helpful for logging.