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Linux The Linux /proc Filesystem as a Programmers' Tool
Post date: June 22, 2005, 05:06 Category: Programming Views: 137
Tutorial quote: My entry into systems programming was guided by my desire to understand further the operating systems I was working with daily as a contract UNIX and, later, Linux system administrator. The result of this was ifchk, a packet sniffer detector I wrote in C and released in June of 2003. ifchk initially was written under IRIX and then ported to Linux, mostly under the 2.4 kernel. The current ifchk revision, beta 4, recently was released and beta 5 is on the way.

My work on ifchk has allowed me to examine programmatically several areas of operating system functionality. Examples include the Linux netlink(7) and rtnetlink(7) facilities, device control--that is, network interfaces--via ioctl(2), signals and proc, the process filesystem. Proc and its ability to display a wide array of data concerning the runtime state of a system are the focus of our discussion here.
Debian An apt-get primer
Post date: April 12, 2005, 13:04 Category: System Views: 90
Tutorial quote: If any single program defines the Debian Linux project, that program is apt-get. apt-get is Debian's main tool for installing and removing software. Working with the .deb package format, apt-get offers sophisticated package management that few Red Hat Package Manager RPM-based distributions can match.

Besides the convenience, an advantage of apt-get is that it reduces the chances of falling into dependency hell, that limbo where software installation fails for lack of another piece of software, whose installation fails for lack of another piece of software, and so on. If you know how Debian's archive system works, and how to choose the sources that apt-get uses, and use a few precautions in your upgrades, then the chances are that dependency problems will never bedevil you. Should you descend into dependency hell anyway, apt-get offers useful tools for climbing out of it.
Linux Connecting to a Wireless LAN with Linux, Part 2
Post date: April 13, 2005, 15:04 Category: Hardware Views: 104
Tutorial quote: In Part 1 we reviewed hardware options, which wireless utilities should be present, how to use Windows drivers, and how to be open to connect to any available wireless access point. Today we'll cover configurations on Red Hat- and Debian-type systems, basic security, and hardware discovery.

Wireless connectivity can be rather overly friendly, allowing connections from anyone. This howto assumes you have a wireless access point on a LAN, which can be all wireless or mixed wired and wireless. You don't want it wide open to just any random person with a desire to snoop on your network or "borrow" your bandwidth, but you want some access controls and security. Your access point should have a unique SSID (service set identifier), WEP (wireless equivalent privacy) or WPA/WPA2 (Wi-fi protected access) set up and working, and either a DHCP server or a pool of assigned IP addresses for clients.
Ubuntu Unofficial Ubuntu 5.04 Starter Guide
Post date: April 13, 2005, 18:04 Category: Miscellaneous Views: 547
Tutorial quote: This is probably the best guide for beginners with Ubuntu. It will help you setup Ubuntu in no time. Amongst other things it will walk you through installing BitTorrent client, edonkey client, email clients, browsers and a lot more. Definitely worth checking out.
Unix+clones Unattended rdiff-backup HOWTO
Post date: April 3, 2006, 04:04 Category: Software Views: 35
Tutorial quote: This page describes how to set up rdiff-backup to run, as a non-root user, unattended from a crontab. We will utilize features of rdiff-backup and OpenSSH to secure the setup as much as possible.
Unix+clones HOW TO: Setup RoundCube Webmail on Your Server
Post date: February 28, 2006, 02:02 Category: Software Views: 125
Tutorial quote: I recently heard about a new webmail client from my friend Justin, who’s infatuated with it. RoundCube, a “browser-based multilingual IMAP client with an application-like user interface,” is the latest and greatest webmail client.
Debian Setup an IPv6 Masquerade Box Under Debian Through IPv4
Post date: April 15, 2005, 20:04 Category: Network Views: 77
Tutorial quote: Configuring IPv6 (over IPv4) under Debian, quite frankly, couldn't be easier. I had a somewhat difficult time in setting it up myself, but that was only because the guides I'd seen on the WWW were designed for operating systems such as FreeBSD. Thus, I have decided to write this document to promote IPv6, and to relieve the frustration of those looking for a no-fuss way to quickly configure IPv6 under Debian.
Linux Grub From the Ground Up
Post date: April 12, 2005, 13:04 Category: Software Views: 39
Tutorial quote: Grub is a world-class boot loader with insufficient documentation. In many ways it blows the doors of LILO. For instance, it's MUCH easier to use Knoppix to rebuild a grub boot loader than to rebuild a LILO boot loader. However, until you're comfortable with grub, it might seem just the opposite. All too often grub dumps you at a grub> prompt with no hint of what you should do. You might have heard that a successful reboot is just three commands away, but which commands? The state of grub's documentation is such that you can't figure it out unless you already know grub.

That catch 22 is the very purpose of this document. This document will to give you enough grub expertise that you can create a grub boot floppy on a working machine with grub installed (not necessarily as the bootloader, just installed), and use that floppy to bust back into a Linux machine with a blown bootloader, and then use that floppy to actually install grub as the bootloader.

This document does not discuss using grub to boot or dual boot Windows, mach, BSD, or other non-Linux operating systems. I might write on that subject later. But in the meantime, once you're familiar with the principles and practices of grub, given some study of existing documentation you'll probably be able to use grub to boot non-Linux operating systems.
Debian Automated distributed backups for laptops
Post date: February 14, 2006, 16:02 Category: Network Views: 42
Tutorial quote: This document will describe the setup I made for automating the backup tasks for all laptops here in the house. My servers use the same backup server and infrastructure, but right now they don't have the checks and scripts because they are online 24/7 and my backup server is triggering the backup process. This is however not true at all for the laptops.

Laptops can be at different places, powered down, suspended, put to sleep etc. So I needed a different approach for them.
RedHat Creating desktop profiles with Sabayon
Post date: July 18, 2005, 18:07 Category: Desktop Views: 101
Tutorial quote: Instead of creating a new desktop setup every single time a new user comes along, it would be much easier to create some templates. If only there were an easy way to make and manage these templates.

Fortunately, we are not the first to ponder this issue. The creators of Sabayon decided to tackle the lack of a good desktop setting management tool. With Sabayon, they created an application that handles these problems and more.