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Since 1994: The Original Monthly Magazine of the Linux Community
Mis à jour : il y a 4 heures 7 minutes

March 2015 Issue of Linux Journal: High-Performance Computing

il y a 8 heures 24 minutes
High Performance: a Relative Term

My Pebble watch has several orders of magnitude more power than the mainframe computers used by NASA to land astronauts on the moon and then get them ba more>>

Catégories: Linux News

April 2015 Video Preview

il y a 8 heures 36 minutes
Catégories: Linux News

Not So Dynamic Updates

lun, 03/30/2015 - 11:33

Typically when a network is under my control, I like my servers to have static IPs. Whether the IPs are truly static (hard-coded into network configuration files on the host) or whether I configure a DHCP server to make static assignments, it's far more convenient when you know a server always will have the same IP. more>>

Catégories: Linux News

Users, Permissions and Multitenant Sites

jeu, 03/26/2015 - 12:28

In my last article, I started to look at multitenant Web applications. These are applications that run a single time, but that can be retrieved via a variety of hostnames. more>>

Catégories: Linux News

New Products

mar, 03/24/2015 - 13:13
Please send information about releases of Linux-related products to or New Products c/o Linux Journal, PO Box 980985, Houston, TX 77098. Submissions are edited for length and content.
Catégories: Linux News

Flexible Access Control with Squid Proxy

lun, 03/23/2015 - 15:10

Large enterprises and nuclear laboratories aren't the only organizations that need an Internet access policy and a means of enforcing it. My household has an Internet access policy, and the technique I've used to enforce it is applicable to almost any organization. In our case, I'm not too concerned about outside security threats. more>>

Catégories: Linux News

Solving ODEs on Linux

jeu, 03/19/2015 - 12:28

Many problems in science and engineering are modeled through ordinary differential equations (ODEs). An ODE is an equation that contains a function of one independent variable and its derivatives. more>>

Catégories: Linux News

DevOps: Everything You Need to Know

jeu, 03/19/2015 - 09:13
Have projects in development that need help? Have a great development operation in place that can ALWAYS be better? more>>
Catégories: Linux News

Tighten Up SSH

mer, 03/18/2015 - 17:06

SSH is a Swiss Army knife and Hogwart's magic wand all rolled into one simple command-line tool. As often as we use it, we sometimes forget that even our encrypted friend can be secured more than it is by default. For a full list of options to turn on and off, simply type man sshd_config to read the man page for the configuration file. more>>

Catégories: Linux News

Security in Three Ds: Detect, Decide and Deny

lun, 03/16/2015 - 13:21

Whenever a server is accessible via the Internet, it's a safe bet that hackers will be trying to access it. Just look at the SSH logs for any server you use, and you'll surely find lots of "authentication failure" lines, originating from IPs that have nothing to do with you or your business. more>>

Catégories: Linux News

Non-Linux FOSS: MenuMeters

jeu, 03/12/2015 - 15:02

It sounds like a "back in my day" story, but I really do miss the days when laptops had LED activity lights for hard drives and Wi-Fi. Sure, some still have them, but for the most part, the latest trend is to have no way of knowing if your application is pegging the CPU at 100%, or if it just locked up. more>>

Catégories: Linux News

Android Candy: Bluetooth Auto Connect

mer, 03/11/2015 - 13:36

I love my latest Android device (see the March 2015 issue's Open-Source Classroom column for details), but for some reason, it won't automatically connect to my Bluetooth headset. When I turn on my headset, I want it to connect to my Android device so I can start using it right away. more>>

Catégories: Linux News

diff -u: What's New in Kernel Development

lun, 03/09/2015 - 13:26

Nicolas Dichtel and Thierry Herbelot pointed out that the directories in the /proc filesystem used a linked list to identify their files. But, this would be slow when /proc directories started having lots of files, which, for example, might happen when the system needed lots of network sockets. more>>

Catégories: Linux News

Geek Guide: The DevOps Toolbox

ven, 03/06/2015 - 11:54

When I was growing up, my father always said, "Work smarter, not harder." Now that I'm an adult, I've found that to be a core concept in my career as a DevOps engineer and manager. In order to work smarter, you've got to have good tools and technology in your corner doing a lot of the repetitive work, so you and your team can handle any exceptions that occur. more>>

Catégories: Linux News

Nmap—Not Just for Evil!

jeu, 03/05/2015 - 16:15

If SSH is the Swiss Army knife of the system administration world, Nmap is a box of dynamite. It's really easy to misuse dynamite and blow your foot off, but it's also a very powerful tool that can do jobs that are impossible without it. more>>

Catégories: Linux News

Resurrecting the Armadillo

mer, 03/04/2015 - 15:19

1999 was a crazy year for business on the Internet, and for Linux. It was when Red Hat went public, with a record valuation, and VA Linux followed with a bigger one. Both were cases in point of the dot-com boom, a speculative bubble inflated by huge expectations of what the Internet would mean for business. more>>

Catégories: Linux News

March 2015 Issue of Linux Journal: System Administration

lun, 03/02/2015 - 11:38

System administration is a very general term. It's our job to fix problems, repair systems and remind people to try power cycling their troubled desktops. more>>

Catégories: Linux News

High-Availability Storage with HA-LVM

jeu, 02/26/2015 - 16:58

In recent years, there has been a trend in which data centers have been opting for commodity hardware and software over proprietary solutions. Why shouldn't they? It offers extremely low costs and the flexibility to build an ecosystem the way it is preferred. The only limitation is the extent of the administrator's imagination. more>>

Catégories: Linux News

DNSMasq, the Pint-Sized Super Dæmon!

mar, 02/24/2015 - 17:03

I've always been a fan of putting aftermarket firmware on consumer-grade routers. Whether it's DD-WRT, Tomato, OpenWRT or whatever your favorite flavor of "better than stock" firmware might be, it just makes economic sense. Unfortunately, my routing needs have surpassed my trusty Linksys router. more>>

Catégories: Linux News

Localhost DNS Cache

lun, 02/23/2015 - 17:25

Is it weird to say that DNS is my favorite protocol? Because DNS is my favorite protocol. There's something about the simplicity of UDP packets combined with the power of a service that the entire Internet relies on that grabs my interest. Through the years, I've been impressed with just how few resources you need to run a modest DNS infrastructure for an internal network. more>>

Catégories: Linux News