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The Best Sources for Free Unix and Linux Education Online. Getting Educated For Free Unix Linux What to Do With Your Free Unix and Linux Education Although it is possible to get an entry-level job in the computer industry with nothing more than a free Unix or Linux education, your chances of success will be much higher if you have experience or certification.

The Best Sources for Free Unix and Linux Education Online

Hands-on job experience is the best. Since experience can sometimes be hard to obtain, your second best bet will be certification. Salary Potential Salaries for computer professionals with a Linux or Unix education vary depending on job title, employer and level of experience. Source: Bureau of Labor Statistics. Jerry Peek's Articles (except Linux Magazine) Linux as a Proxy Server. Proxy servers are software applications that run on your firewall machine in order to provide indirect Internet access to your network.

Linux as a Proxy Server

The firewall can be either a “single-homed” host or a “dual-homed” host. A single-homed host is a machine with one network card. This configuration relies on the Internet router to block all packets to any machine except the firewall. A dual-homed host is a machine with two network cards that has routing capabilities disabled. Computers behind the firewall can talk to the dual-homed host, and computers on the Internet can communicate with the dual-homed host.

The proxy server is used to allow Internet access from inside the protected network through either the single or dual-homed host firewall. The proxy server takes a packet from inside your network that is bound for the Internet and changes the “from” address to its own address. This method is a big advantage when you access FTP sites that do double-reverse lookups. Listing 1 Table 1. Open CourseWare for Linux Geeks: 50+ Resources. The Open CourseWare movement is centered on freedom of information, so it's only natural that Open CourseWare offers education on an open format such as Linux.

Open CourseWare for Linux Geeks: 50+ Resources

Whether you're just getting started or are an advanced developer, there's something out there for you to learn. Here, we've highlighted more than 50 of the best Linux courses you can take. Scott Klarrs Blog. The Linux Information Project (LINFO) Home Page. LinuxHelp.net. HowtoForge - Linux Howtos and Tutorials. Frequently asked question by Linux, UNIX, FreeBSD, OpenBSD newbie. Linux Howtos: Network -> Using netstat. You are here: Network Just typing netstat should display a long list of information that's usually more than you want to go through at any given time.The trick to keeping the information useful is knowing what you're looking for and how to tell netstat to only display that information.

Linux Howtos: Network -> Using netstat

For example, if you only want to see TCP connections, use netstat --tcp.This shows a list of TCP connections to and from your machine. The following example shows connections to our machine on ports 993 (imaps), 143 (imap), 110 (pop3), 25 (smtp), and 22 (ssh).It also shows a connection from our machine to a remote machine on port 389 (ldap). Note: To speed things up you can use the --numeric option to avoid having to do name resolution on addresses and display the IP only. Code Listing 1: netstat --tcp Code Listing 2: netstat --tcp --listening --programs Note: Using --all displays both connections and listening ports. The next example uses netstat --route to display the routing table. Linux Documentation - Guides (List of eBooks) Graphical vi-vim Cheat Sheet and Tutorial. Learning vi or vim is not easy.

Graphical vi-vim Cheat Sheet and Tutorial

But it doesn't have to be that difficult, either. It is, in any case, faster, more powerful, and more productive than editing with any other editor, so you would do very well in investing the time and effort to learn it. Being a vi lover myself, I came up with the idea of providing a graphical cheat sheet for those learning vi or vim, and I also found out it was a very good way to structure a tutorial. Here are the results for your learning enjoyment (or your colleagues'). By the way, I recently published the definitive article explaining why vi/vim editing is so much better than regular editing.

Graphical cheat sheet This is a single page describing the full vi/vim input model, the function of all keys, and all major features. Graphical cheat sheet based tutorial The tutorial above is structured in 7 lessons that cover the major commands in vi/vim. Notes. Unix, Linux, Mac OS X Help, Tutorials and support pages. Seders's grab bag - Tutorials. If you have written anything about sed - whether an introduction, how sed got you out of a real-life situation, or perhaps an advanced technique you've discovered - you may like have your work published here.

Seders's grab bag - Tutorials

Your contribution will be very welcome. Intros sed one-liners (18kb) The essential, official compendium of useful sed one-liners. Organised into sections by usage, such as file spacing, line numbering, selective line removal/deletion and optimisation. The sed FAQ v15 (168kb) Another sed FAQ And here is another sed FAQ, by a different person. The Linux Cookbook: Tips and Techniques for Everyday Uses. Linux Tips & Tricks : section all. Doing Things In GNU/Linux. Linux Library. Welcome to LTT : Linux Tips & Tricks. "Decibels Linux Help Index" Start Linux tutorials read at start-linux.com. Docs - Linux Docs. Linux Learning Zone - Find out everything about Linux here. Linux Newbie Guide by Stan, Peter and Marie Klimas.

Intro.

Linux Newbie Guide by Stan, Peter and Marie Klimas

We are relative Linux newbies (with Linux since Summer 1998). We run mostly RedHat and Mandrake -> the solutions might not be directly applicable to other Linux distributions (although most of them probably will be). Hope this helps; we try to be as practical as possible. Of course, we provide no warranty whatsoever. If you spotted a bad error or would like to contribute a part on a topic of your choice, we would like to hear from you. General description of this Guide. Conventions: <> = single special or function key on the keyboard. Part 0: For the Undecided (Linux Benefits) If you are wondering what the Linux pros and cons are, and whether Linux is for you. Part 1: Before Linux Installation What distribution should I use, how to obtain it, Linux hardware requirements, how to partition your hard drive, about dual boot, which packages to install, which graphical user interface (GUI) to install (gnome or kde?)

Licence, Acknowledgments and log of changes. Linux Knowledge Base and Tutorial. Table of Contents Introduction to Operating Systems This section provides an introduction to basic operating system principles from a Linux perspective.

Linux Knowledge Base and Tutorial

We talk about processes, files and directories and the basics of how a user interacts with the system. Linux rute tutorial. Using the Linux command line. GIMP Tutorials.