If you are looking to find more tools, the GNU projectGNU (GNU's Not Unix) maintains a directory, a website listing categorized links to various free-software tools (which they consider useful) called the GNU Directory.GNU DirectoryAlso try sites such as Sweet CodeSweet Code which offer mailing lists of useful tools which they find.You may also try looking at the most highly rated, most active or most downloaded programs at SourceForgeSourceForge and FreshMeat.FreshMeat Many of the tools listed in this guide are part of a package of tools, such as diffutils diffutilswhich contains the various tools used to find differences between files, such as diffdiff, sdiffsdiff, diff3diff3, cmpcmp. Most small tools are bundled together in this fashion. Most major distribution's will offer a search function to help you search the packages by file, you can of course do this via the command-line interfacecommand-line interface or a GUIGUI.If you need to search the distribution's available packagespackages via the command-linecommand-line, the method will vary depending on the distribution you are using, see the subsections below or consult your distribution's documentation (or of course the internet):To find where a particular file came from use urpmf.urpmfCommand syntax:urpmfThe results are often overwhelming as this particular command will take a string and list every file of every packagepackage in it's database that contains the particular keywordkeyword (ie. both uninstalled and installed packagespackages). To refine the results you may want to add a pipe to it and send it through grep -w file_name grep(the -w option will only show you only exact (whole word) matches). How you would do this is shown below:For more information on the urpm* commands, please refer to the tip towards the end of this section: . To find which packagepackage a particular file came from use rpm with the -qf option.Command syntax:rpm -qfThis will find which package the file came from. You need to use rpm -qf not with a keywordkeyword but with the location of the actual file. To find more information on the particular package listed use rpm with the -qi option.rpm -qiCommand syntax:Note that the package name is the name of the package without the .arch.rpm (often .i386.rpm) extension on the end.For more information on the usage of rpm, please refer to this section . To find where a particular file came from use dpkg with the -S option.There are two ways to do this:dpkgordpkg -S:You may also like to try (if it's installed, it's generally a lot faster than the dpkg search):dlocateFor more information on dpkg and dlocatedlocate please refer to the relevant manual pages and online sources of information. PackagesPackages can be found via the internet utilizing sites such as:RPMFindRPMFind for RPM based packages.Debian Package ListDebian Package Listfor debdeb packages.RPMSeekRPMSeek, this site intends to index Debian packages as well as RPMRPM.TuxFinderTuxFinder where you can search for deb, rpm, tgz, iso and even documentation.Also try the author's homepage and large sites such as FreshMeatFreshMeat and SourceForge.SourceForge This guide is simply a short summary of some of the available tools of a GNU/Linux based distribution. If you find a particular command interesting and useful, you can look up the on-line manual, or/and info page to learn more about how to use this command or check the HOWTO's online at Linux Documentation Project. Linux Documentation ProjectThe manual/infomanualinfo pages will always be an up-to-date source of information on how to use the command. Also have a look at the documentation installed on your distribution, its normally located in /usr/share/doc.Check the referencesreferences section of this document, , for some links to useful resources which were used in the creation of this document.Of course if you are having trouble with a particular command try using a search engine such as GoogleGoogle or AllTheWebAllTheWeb, or search the usenet groups Google Groups.Google Groups If you still can't find a solution, look for a mailing list which is related to the topic you are having trouble with, or try a forum which is related to the topic.Readers who would like another reference to commands may want to have at:command-listsCommands from "Linux in a Nutshell 3rd Edition"Linux in a Nutshell as published by Orielly --- this document was not used in the creation of this guide, however it is a comprehensive guide to GNU/Linux Commands (it's an indexed listing). It lists and explains 379 commands taken from Linux in a Nutshell 3rd Edition.The Linux Newbie Admin guide list of commandsLinux Newbie Admin guide --- another list of commands from an excellent system administration guide for GNU/Linux.Comptechdoc's Linux Command Quickreference GuideComptechdoc's Linux Command Quickreference --- a good list of commands but only one line explanations of what they actually do...SS64.com list of bash commandsSS64.com list of commands --- this page lists commands and links to their man pages online.If you wish to learn more about GNU/Linux on a variety of subjects also see the various online (free) tutorials published by IBM Developerworks.IBM DeveloperworksIf you wish to explore all of Linux distributions, visit List of all secure Linux distributions, List of all special purpose Linux distributions, and List of popular Linux distributionsLinux DistributionsIf you are looking for a general reference to everything GNU/Linux try the Rute User's Tutorial and Exposition.Rute User's Tutorial and Exposition Or take a look at your distributions documentation, Debian maintains comprehensive documentation, debian documentation site.Debian documentation The most obvious place to look for documentation is to find the homepage of the program. Although sometimes there are other sources of information such as the Linux Documentation ProjectLinux Documentation Project or various online HOWTO'sHOWTO's or similar guides. They are usually easily found using search engines. Try large sites such as (ibiblio) the publics library and digital archiveibiblio or TuxFinderTuxFinder which can search for documentation.Below is a very short list of some further reading for a few of the more complex tools:OpenSSHOpenSSH OpenSSH manual pagevimvim The Vim HOWTOemacsemacs The Emacs HOWTORPMRPM RPM HOWTOSambaSamba Samba documentation siteImageMagickImageMagick ImageMagick command-line toolsBASHBASH BASH reference manualBash scriptingbash scripting Advanced bash scripting guidersyncrsync rsync homepageAn article within the coreutilscoreutils documentation (installed on nearly every GNU/Linux distro) provides further explanation of the UNIX toolsUNIX tools philosophy. To access the article simply type: Then type / (slash; runs a search) then the string “toolbox” (toolbox is the string to be searched for) then hit enter (follow hyperlink) and then go down to the “Toolbox introduction” section and hit enter. This will give you access to the article.Other articles online include an: Orielly article on the UNIX tools philosophy.UNIX tools philosophyOriellyA listing of important qualities of the philosophy.Linux Exposed The Unix Philosophy Explained[http://www.linuxexposed.com/Articles/General/Linux ExposedOr an entire book which is considered the authoritative guide toward understanding the philosophy behind how the UNIX system was built. 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