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Mike Angelo writes: "Digital music players are very popular these days and are available from many manufacturers. One nice feature of the Lexar Digital Music Player (LDP-200) is that it uses SD memory cards to store the music files, thus providing it with almost unlimited memory. Another nice plus for the Lexar Digital Music Player is that you can use it with most all popular, desktop operating systems -- the GNU-Linux, Mac, and Microsoft Windows platforms."
[Nice price, multi-OS, and multi-purpose! Warning: only tested on Mandriva, but they're probably right about it working with most other *NIX variants - Ed]
Replacing ms dns with bind9 is an better idea here is why:
1.It's really faster (noticed when i run first query on that machine and had lower latency)
2.Better security (windows2k is not supported with patches in future)
3.You can migrate easily to linux after that ;)
[Ed.- This is a good quickstart. Please do the Internet a favor and study the BIND documentation thoroughly.]
Our search-and-rescue expert is back to share how he recovered a master boot record and reclaimed lost data.
[If you're a PC Tech, you probably should be reading this... - Ed]
Hi, and welcome to the third in a series of articles on Security Enhanced Linux. My first SELinux article detailed the background of SELinux, while my second article in the series discussed how SELinux makes access decisions. This week, I'll talk about how an SELinux system differs from a standard Linux system in terms of administration. Most of what you already know about Linux system administration will still apply to an SELinux system, but there are some additions and changes that are critical to understand when using SELinux.
When open source software is mentioned, one of the first thoughts that comes to mind is the LAMP stack (Linux, Apache, MySQL, and PHP/Perl/Python). While these products are not generally associated with Windows development, at least one of them is certainly well suited for Windows development, particularly when using .NET. The MySQL database server is an open source relational database developed by MySQL AB. MySQL is available for Windows, Linux, UNIX, and the Macintosh operating system. Using MySQL with Windows has never been easier with .NET and ADO.NET.
This section is aimed at all those who have no or limited Linux experience, and are unfamiliar with software repositories. It occurred to me that novice Linux users are often at a loss where to get software, and the next thing that happens is that they manage to find some rpm file somewhere on the internet, and run into what is aptly called 'dependency hell' (for Linux insiders: note the pun! Ah well, I'm not good with those anyway..). So I decided to put up a couple of paragraphs about software installation, and clear up a few puzzling points.
[Ed.- great article- only please, for the love of $deity and readability, lose the text-scrolling-over-fixed background. Ow.]
Where are you headed in your technology career? If Shakespeare is correct in his renowned soliloquy on the seven phases of life in As You Like It, you stand to lose your sense of taste, your eyesight, and your teeth. Life moves quickly for the technologist: one day, you're a reticent rookie whose broken code generates core dumps; the next, you are the center of attention and the slickest talker in the design review session. But ultimately, you fade into old age and fall apart like some antiquated IT system: a curious relic with no value and in need of maintenance.
[Ed.- Don't let the lead scare you- the author tells how to avoid becoming old, toothless, and unwanted. At least in your career.]
Networks don't work without addresses: Whenever you are sending something, you need to specify where it should go and where it came from. To be an effective network engineer or administrator, you need to understand IP addresses backward and forward: you need to be able to think on your feet. If something breaks, likely as not some address assignment has been screwed up. And spotting the problem quickly is likely to be the difference between being the hero, or the guy who "takes a long time to fix the problem." Before covering subnetting in the next Networking 101 installment, we'd like to thoroughly explore IP addresses in their primal form. This is crucial to understanding subnets.
[Ed.- This should be a great series. Stay tuned for more.]
Have an analytical mind? Like to cook? This is the site to read!
[Ed.- This is an excellent site that could teach traditional cookbook authors a few things. Bon appetit!]
This tutorial describes how to install a Proftpd server that uses virtual users from a MySQL database instead of real system users.
With the advent of high-speed Internet links from Internet Service Providers (ISPs), it's easier for users to host services on their home computers. But what happens when your ISP connection goes down? An obvious solution is to have a redundant Internet connection from another ISP. To help set up a Linux host with redundant Internet connections, this article covers the following essentials:
1. Configuring the host to properly handle inbound network connections from multiple ISPs
2. Load-balancing outbound network connections
3. Configuring various services to enable redundancy
4. Configuring firewall protection using ipchains or iptables
[Ed.- Linux has all the tools to implement just about any kind of networking scenario- you don't need to spend megabucks on pricey commercial widgets.]
We've previously covered setting up your own repository for the Debian's apt-get system, but we didn't cover managing automatic uploads. Thankfully this is a simple task with the reprepro, and dupload tools and a small amount of scripting.
The reprepro package is tool for creating an APT repository with a pool structure, the same type of structure the official Debian mirrors use.
The repository may:
Contain packages for multiple distributions: Stable, Unstable, Testing, etc. Contain packages for multiple architectures: x86, sparc, all, etc. Be managed quickly and easily.
4 out of 5 Internet users use Microsoft Internet Explorer as their web browser. Internet Explorer presents a critical security risk to systems that use it, allowing malicious websites to hijack their computers, infect them with viruses, and conduct identity theft. It is in the best interest of all Internet users to stop using Internet Explorer as soon as possible! There are free alternatives that offer quality as good or better than Internet Explorer. The following article will explain in greater depth the problems with Internet Explorer and what the alternatives are.
[Ed.- This is an excellent comparison and analysis that compares aieee I mean Internet Explorer, Firefox, and Opera. It even has pretty graphs comparing the number and severity of vulnerabilities and time-to-patch. Very good even for non-technical users and decision-makers.]
Years removed from the original release of Postfix, the Unix-based mail server is still serving oodles of people every day. As a great alternative to Microsoft Exchange and the predecessor to crazy uncle Sendmail, Postfix is becoming the Linux mail server of choice, and is the SMTP mail transfer agent for Mac OS X Server. Sendmail may have a larger market share in the Linux community, but Postfix has a much simpler setup and is good for users who do not want to spend a lot of time configuring a mail server.
Last week we rambled over the OpenWRT landscape, issued dire warnings and concluded with the easy, but risky, installation method. Today we'll learn the harder, but much safer, installation method. This one is fun, because it depends on an unpatched bug in the Linksys firmware.
Not a graphics guru but you would like to know a little bit about creating a nice background? Using the gimp in a few steps, a variety of nice backgrounds can be yours for your X desktop.
It's official: as of December 31, 2004, Windows NT4 is no longer supported by Microsoft... For all of you hardworking sysadmins of NT4 domain controllers who are now wondering what to do, here are some of your options:
1. Change nothing. So you lose vendor support — so what? Was it so hot in the first place?
2. Upgrade to Windows XP or 2003. This costs much money in licenses, and you may need to upgrade your hardware as well. Plus you'll have a whole new set of bugs and security holes to get acquainted with. However, this also gives you Active Directory, which may be something you want to move up to.
3. Replace your NT4 box with a Samba 3 domain controller.
This series is about option 3...
[Ed.- Yes, this is an older article, but it's still a goodie. Part 2 is here.]
Despite this enormous increase in memory capacity, many of the problems that exist on today's machines are the same as those of their early predecessors--namely, running out of memory.
This article, the first in the series, discusses the Unix dynamic memory allocation system along with the concept of memory segmentation. It also reviews the utilities top and ulimit, giving special attention to their role in memory management. Memory management is an important concept to grasp regardless of which programming language you use. You must be most careful with C, where you control all memory allocation and freeing. Languages such as C++, Java, Perl, and PHP take care of a lot of the housekeeping automatically. Nevertheless, all of these languages and others can allocate memory dynamically, and thus the following discussion applies to them all
Welcome to today's installment of More Tips and Tricks For Hardworking Admins, the finest and freshest collection of mini-howtos on the Web. Today we'll do dynamic blocking of SSH server attacks, run nested window managers, and take a peek at hacking the Linksys WRTG54.
[Ed.- The DenyHosts utility, for dynamic blocking of SSH or other port attacks, is quite ingenious and easy to use. Also, XNest is covered, for running multiple window managers simultaneously. Just try to do that with poor ole feeble MS Windows!]
[Ed.- Here is a collection of good articles on building a business on Ebay, from starting out to building an attractive storefront, to auction-management tools, to protecting yourself from fraud. ]
The capital of high technology (San Jose) is the logical cauldron of Techno Pumpkin Making. This page is dedicated to furthering the art of Power Tool Pumpkins, by showing how I make mine.
[Ed.- This demonstrates that real hackers can hack anything! An interesting bit of trivia- this site is the #1 hit on Google for 'pumpkin trepanning'.]
[Ed: For those who have not checked out Falko's Howtos, we highly recommend them. - tadelste]
This tutorial describes how to install a PureFTPd server that uses virtual users from a MySQL database instead of real system users. In addition to that I will show the use of quota and upload/download bandwidth limits with this setup.
How would you like the flexibility to troubleshoot system problems from anywhere? How would you like the ability to have others watch what you are doing, and even help? And how would you like to have everything logged, so you can "go back in time" and review past events? These are just some of the things conserver can do for you.
[Ed.- Linux console servers, while not the most fun to use for everyday administration, can be real life-savers when everything else goes *poof*. Conserver is a free, sophisticated console server with a great feature set that takes you far beyond good ole Minicom and a null-modem cable.]
If you have ever thought, even half seriously, that you would like to write a practical book about computers or computer software, then you probably can. Moreover, given the proper editorial and publishing support, you can probably write a successful book. It's all a matter of doing the right things in the right order. And it helps a great deal if you have a publisher willing to do everything in its power to help you along.
[Ed.- I write books for O'Reilly, so naturally I think they are the bee's knees. However, much of the information in this article applies to all publishing, and most publishers post similar guides on their Websites. If you think you have a book or two in you, go for it- there is all kinds of information here that will help you.]
Basically the plan is to configure Samba on a PC under GNU/Linux such that another PC with some flavor of Windows can access a share on it. Then, the software that came with the combo device can be used on the Windows machine to scan a document, and save it on a Samba share, in a directory on the Linux machine. And from there OpenOffice.org can access the result of scanning, and print it over the network to the network printer.
[Ed.- This is an ingenious hack that kept a partially-functioning combination fax/printer/scanner/copier in service, and is easily adaptable for other scenarios.]
Asterisk is an open source PBX (private branch exchange) that provides all the functionality of high-end business telephone systems, and much more. It is the world's most flexible and extensible telephone system, providing many features that are not yet available in even the most advanced proprietary systems. It is also the world's cheapest telephone system. The software is free and runs on inexpensive Linux servers.
[Ed.- Asterisk is teh hawt. If you've ever rented space on a shared PBX with a single master password that is never changed, or hassled with telecom techs who just don't seem to understand why you want things to work right, take your telephony system into your own hands with Asterisk.]
The ideal programming language for beginners should offer the minimum barrier between thought processes and their concrete implementation as programs on the machine. It should not be a ‘toy’ language - its structure should be rich enough to express complex computer science concepts without being awkward. The language should encourage good coding habits and students should be able to look at it as an extension of the three things which they have already mastered to varying levels of proficiency - reading, writing and mathematics. Do we have such languages? Yes - the programming language Scheme fits in admirably.
Centralized management of user accounts solves a major problem in distributed computing environments. Without centralization in an environment with X users, Y computers, and Z services, we have (X*Y)+(X*Z) accounts to manage. With centralization, we have X+Y+Z accounts to manage. In this article, I will provide an overview of user account management with Kerberos and LDAP. I will describe the protocols and how they work as well as their implementation. Finally, I will discuss how to manage accounts using this new system.
[Ed.- this is a wonderfully detailed howto that clearly explains how all the pieces work, written by a Google System Administrator, so presumably he has had a lot of practice!]
This article should help a Linux system administrator with optimizing a server for Web/Database usage. This article will be usefull for any type of server as it has some general tweaks listed, however the article is geared towards MySQL and Apache 2.*
Only the most basic stuff is covered here, the original article was for Oracle Administrators new to Linux.
Here is a short article explaining some basics about file systems
. This is an area in which many people, even full time computer users, lack much understanding. Its kind of important!
Kernel terminology gets tossed about quite a bit. One of the more common topics regarding operating system kernels is the overall design. In particular how the kernel is structured.
Once my original Mini-ITX project was completed I finally had a chance to sit back and use the computer. Knowing how simple my needs were, the Mini-ITX project computer was orginally designed to be as basic and quiet as possible. This meant no hard drive, no extra accessories- just a stripped down system. While this suited my needs well at the time, its lack of versatility soon became an issue.
After spending any amount of time playing (and yes, when necessary, working) with Linux systems, you can't help but notice that penguins do tend to figure prominently in the mythos of the operating system. Penguins show up everywhere — from the Linux mascot, Tux (designed by Larry Ewing), to the numerous variations on the penguin theme, you can't go near a Linux system, magazine, T-shirt, mouse pad, coffee mug, or book, without running into some kind of penguin. That's okay for most people because, well, penguins are cute.
This tutorial describes how to do automated server backups with the tool rdiff-backup. rdiff-backup lets you make backups over a network using SSH so that the data transfer is encrypted.
What is all this K stuff? That's often the question when people that have never used Linux and KDE ask when logging in to the environment for the first time. The K naming convention is often portrayed as confusing and cheesy, lacking professionalism. This article discusses the KDE audio mixer. It is the first in a series, each one devoted to a different KDE application. editors note: That is the blog's name.
This document describes how to install a mail server based on Postfix that is based on virtual users and domains, i.e. users and domains that are in a MySQL database.
Here, let’s see how to use CVS and SVN to access the development tree of a few notable projects. (Jeremy Garcia is the founder and administrator of LinuxQuestions.org, a free, friendly, and active Linux community. )
This guide shows how to set up a web, mail, and ftp server with Ubuntu 5.04 "The Hoary Hedgehog" and demonstrates the details with the help of 21 screenshots.
This is a detailed description about the steps to be taken to setup a Ubuntu based server (Ubuntu 5.0.4 - The Hoary Hedgehog) that offers all services needed by ISPs and hosters (web server (SSL-capable), mail server (with SMTP-AUTH and TLS!), DNS server, FTP server, MySQL server, POP3/POP3s/IMAP/IMAPs, Quota, Firewall, etc.).
This is a very detailed tutorial about how to use the new SuSE 10.0 to set up a web, mail, and ftp server.
The Enlightenment project has created a great deal of incredibly useful software as a result of working on a window manager. One piece of that software is the Epeg API. The Epeg software is designed solely to thumbnail - fast. In two other articles , single file thumbnailing and using a hardcoded source to destination directory method was used. In this text, the two are combined.
ntegrating Fedora Linux into a Windows network is reasonable and easy as long as you use the SAMBA utilities. This article includes the necessary steps for implementing a SAMBA server in a Windows environment. Once integrated, a Linux server looks and acts exactly like any other server on a Windows intranet... Complete article
Here is a nice little two-part introduction to using MySQL as a backend for Linux system services, like Samba user authentication and mail servers. Covers the basics of creating a database, tables, finding, adding, deleting, and changing data. Also a good beginning general-purpose MySQL howto.
These are the steps
to build a hylafax server. (oh yeah, i almost forgot, you should definitely called the fax server we build "HylaMonster").
This project will demonstrate how to connect to an access point to a Zaurus 5500 with the Sharp OS version 3.0 without encryption and using DHCP just to verify that you can connect. Once this is established it is important to secure the Zaurus and use encryption from access point in the next section.
Moving on with Epeg, using a source directory of images to either create or update a thumbnail directory.
In C Daemon II, using options and syslog is added plus a look at external software to help.
Expanding the simple C Daemon with arguments, options, syslog, and a look at other daemon software.
A long time ago (when the Earth was young), I worked as a top-40 disc jockey for a local radio station. The years have passed but my passion for radio hasn't dwindled. A few months ago, I discovered Xiph.org's icecast.org directory of music streams. Not long after that, I ran across SHOUTcast. Between these two Web sites, I had access to literally thousands of Internet radio streams, both professional and amateur, covering every imaginable musical taste. As you can well imagine, browsing through these sites can become a rather time-consuming process — not that I minded, but time is something I seem to have a lot less of these days. That's why I like Jean-Yves Lefort's streamtuner so much.
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