{| class = "wikitable" style = "text-align: center;" cellpadding = "2"Linux is a powerful developer operating system that can be quite confusing at times. This can include but is not limited to using the system (?), setting up a network, and finding important files. Please see below for help on various subjects in Linux.
|-! Command Name !! Command Description|- | cat *[filename] || Display file’s contents to the standard output device (usually your monitor).|-| cd /directorypath || Change to directory.|-| chmod [options] mode filename This Is Your Brain On Informatics: Linux Commands|| Change a file’s permissions.|-| chown [options] filename || Change who owns a file.|-| clear || Clear a command line screen/window for a fresh start.|-| cp [options] source destination || Copy files and directories.|-| date [options] || Display or set Using the system date and time.|-| df [optionsSystem] || 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] This Is Your Brain On Informatics: Common Pathnames|| Search for files matching a provided pattern.|-| grep [optionsCommon Pathnames] pattern [filesname] || Search files or output for a particular pattern.|-| kill *[options] pid || Stop a process. If the process refuses to stop, use kill -9 pid.|-| less [options] [filename] This Is Your Brain On Informatics: Network|| View Setting up the contents of a file one page at a time.|-| ln [optionsNetwork] source [destination] || Create a shortcut.|-| locate filename || Search a copy of your filesystem for the specified filename.|-| lpr *[options] || Send a print job.|-| ls [options] This Is Your Brain On Informatics: DenyHosts|| List directory contents.|-| /man [command] || Display the help information for the specified command.|-| mkdir [options] directory || Create a new directory.|-| mv [options] source destination || Rename or move file(s) or directories.|-| passwd [name [password]] || 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.|-| rmdir [options] directory || Delete empty directories.|-| ssh [optionsWorking with DenyHosts] user@machine || Remotely log in to another Linux machine, over the network.|-| Exit || Leave an ssh session by typing |-| su [options] [user [arguments]] || 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.
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