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This page lists some of the more commonly used UNIX commands. Commands are case sensitive and are usually lower case. Spaces are very important. Given below is the list of commands in Files and Directories. Sr.No. Command & Description. 1 cat. Displays File Contents. 2 cd. Unix/Linux Command Reference. File Commands. 1. ls. Directory listing. 2. ls -al. Formatted listing with hidden files. 3. ls -lt. Caution: A file may contain useful information. It is always recommended to be careful while using this Delete command. It is better to use the -i option along Examples: chmod u+x file (add permission to the user to execute the file) chmod 751 file (chmod u=rwx, g=rx, o=x file) They are the same command. chown [ mv is the move command that moves a file. This command is also used for renaming files. rm is the remove command and will remove the file or empty directory This leaflet contains basic information on thirty of the most frequently used Unix Commands. It is intended for Unix beginners who need a guide to the names and Makes directories. mkdir mydirectory. Creates the directory mydirectory. This command is very useful in organizing the contents of a directory. cd. if myfile2 exists, this will overwrite it! rm myfile removes file called myfile rm –f myfile removes myfile without asking you for confirmation. useful if using