Command Descriptioncat [filename] Display file’s contents Linux is a powerful developer operating system that can be quite confusing at times. This can include but is not limited to using the standard output device system (usually your monitor?).cd /directorypath Change to directory.chmod [options] mode filename Change , setting up a file’s permissions.chown [options] filename Change who owns a filenetwork, and finding important files.clear Clear a command line screen/window Please see below for a fresh starthelp on various subjects in Linux.cp [options] source destination Copy files and directories.date *[options] Display or set the system date and time.df [options] Display used and available disk space.du [options] Show how much space each file takes up.file [options] filename Determine what type of data is within a file.find [pathname] [expression] Search for files matching a provided pattern.grep [options] pattern [filesname] Search files or output for a particular pattern.kill [options] pid Stop a process. If This Is Your Brain On Informatics: Linux Commands|Using the process refuses to stop, use kill -9 pid.less [optionsSystem] [filename] View the contents of a file one page at a time.ln *[options] source [destinationThis Is Your Brain On Informatics: Common Pathnames|Common Pathnames] Create a shortcut.locate filename Search a copy of your filesystem for the specified filename.lpr [options] Send a print job.ls *[options] List directory contents.man [command] Display the help information for This Is Your Brain On Informatics: Network|Setting up the specified command.mkdir [optionsNetwork] directory Create a new directory.mv [options] source destination Rename or move file(s) or directories.passwd *[name [passwordThis Is Your Brain On Informatics: DenyHosts|Working with DenyHosts]] Change the password or allow (for the system administrator) to change any password.ps [options] Display a snapshot of the currently running processes.pwd Display the pathname for the current directory.rm [options] directory Remove (delete) file(s) and/or directories.{{This Is Your Brain On Informatics}}rmdir [options] directory Delete empty directories.ssh [options] user@machine Remotely log in to another Linux machine, over the network. Leave an ssh session by typing exit.su [options] [user [argumentsCategory:This Is Your Brain On Informatics]] Switch to another user account.tail [options] [filename] Display the last n lines of a file (the default is 10).tar [options] filename Store and extract files from a tarfile (.tar) or tarball (.tar.gz or .tgz).top Displays the resources being used on your system. Press q to exit.touch filename Create an empty file with the specified name.who [options] Display who is logged on.