==Linux Tutorial from Class==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.
<p>Below are listed some common linux commands listed in alphabetical order that have been seen in class along with some others for reference. Syntax of *[[This Is Your Brain On Informatics: Linux Commands|Using the command is indicated by bracketed information. One common syntax includes System]]*[options[This Is Your Brain On Informatics: Common Pathnames|Common Pathnames]], which indicates modifications to *[[This Is Your Brain On Informatics: Network|Setting up the command that can be added via a dash followed by an appropriate letter (e.g. -i for the rm command). </p>Network]]*[[This Is Your Brain On Informatics: DenyHosts|Working with DenyHosts]]
{| class = "wikitable" style = "" cellpadding = "" border = "1"
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! colspan = "2" | Common Linux Commands
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! Command Name !! Command Description
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| cat [filename] || Display file’s contents to the standard output device (usually your monitor).
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| cd [/directorypath] || Change to directory.
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| chmod [options] [mode] [filename] || Change a file’s permissions.
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| chown [options] [filename] || Change who owns a file.
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| clear || Clear a command line screen/window for a fresh start.
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| cp [options] [source] [destination] || Copy files and directories.
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| date [options] || Display or set the system date and time.
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| df [options] || Display used and available disk space.
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| du [options] || Show how much space each file takes up.
|-
| Exit || Leave an ssh session by typing
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| file [options] [filename] || Determine what type of data is within a file.
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| find [pathname] [expression] || Search for files matching a provided pattern.
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| grep [options] [pattern] [filesname] || Search files or output for a particular pattern.
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| kill [options] pid || Stop a process. If the process refuses to stop, use kill -9 pid.
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| less [options] [filename] || View the contents of a file one page at a time.
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| ln [options] [source] [destination] || Create a shortcut.
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| locate [filename] || Search a copy of your filesystem for the specified filename.
|-
| lpr [options] || Send a print job.
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| ls [options] || List directory contents.
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| /man [command] || Display the help information for the specified command.
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| mkdir [options] [directory] || Create a new directory.
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| mv [options] [source] [destination] || Rename or move file(s) or directories.
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| 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.
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| pwd || Display the pathname for the current directory.
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| rm [options] [directory] || Remove (delete) file(s) and/or directories.
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| rmdir [options] [directory] || Delete empty directories.
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| ssh [options] [user@machine] || Remotely log in to another Linux machine, over the network.
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| su [options] [user [arguments]] || Switch to another user account.
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| tail [options] [filename] || Display the last n lines of a file (the default is 10).
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| tar [options] [filename] || Store and extract files from a tarfile (.tar) or tarball
(.tar.gz or .tgz).
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| top || Displays the resources being used on your system. Press q to exit.
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| touch [filename] || Create an empty file with the specified name.
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|wget [url] || Downloads a file from the internet at the specified url.
|-
| who [options] || Display who is logged on.
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