Articles tagged with: Linux
Linux commands: Newusers adds new users … fast and furious!
May 14, 2013, 11:39 AM — Newusers is a tool that you can use for fast and furious setup of accounts on a Linux server, but you need to know how it works before …
Counting processors on your Linux box
February 04, 2013, 10:52 AM — Ever since the /proc file system first made an appearance on Unix systems, getting information on running processes became a whole lot easier. The useful, but too …
The Story of Linux: Commemorating 20 Years of the Linux Operating System
Celebrate the 20th Anniversary of Linux with us. Watch the Story of Linux to remember – or learn for the first time – how Linux disrupted a market and has begun to change the world. …
Ubuntu 12.10 Review – Linux Distro Reviews
==What do you think of Ubuntu’s cloud integration?== A review of the latest update to Ubuntu, the Quantal Quetzal. Sporting all new cloud integration with both online accounts, and the Amazon online store, this Ubuntu …
TLDR: What Would Make You Switch from Mac to Windows to Linux?
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Why Linux Sucks | LFNW 2012
2012 is an amazing time for Linux. Huge changes. Amazing opportunities. …And lots and lots of ways that using Linux just plain sucks. We’ll look at some of the more interesting (to me) things that …
The Origins of Linux – Linus Torvalds
[Recorded Sept 19, 2001] Linus Torvalds, the creator of the operating system phenomenon Linux, tells the story of how he went from writing code as a graduate student in Helsinki in the early 1990s to …
Parallella: Low-Cost Linux Multi-Core Computing
Parallella is an attempt to make Linux parallel computing easier and is advertised as a “supercomputer for everyone”, but will it come to fruition?
Parallella is an attempt to make Linux parallel computing easier and is …
Force NTP Time Update on Linux
Imagine this: you created the /etc/ntp.conf file, enabled and started the ntpd service, and… the system time is still off. Is there a way to force time sync with the NTP server? It must be your lucky day. All you have to do is to connect to your box as root and run the following command…
Converting 1080i to 720p for XBMC
If you are using XBMC as your video player, you might have encountered a problem playing 1080i AVCHD (*.ts or *.m2ts) videos. When playing such files, you may see just a gray screen with some …
Server and Network Monitoring with iPhone
What is a Unix sysadmin doing with an iPhone, you ask? It was a birthday present, if that’s all right with you. I know, I should have gotten something odd with a beta version of …
How to Really Kill Computer Viruses
How do you know if your computer has a virus? Is it connected to the Internet? Then it has a virus. Many computer viruses and other malicious applications are very resilient and will actively resist any attempts to deactivate and remove them. Some viruses can even delete your antivirus application or prevent it from working properly. Many viruses cannot be effectively removed once they are loaded in memory and active.
Forcing Linux to Reboot
Until I branched out a few years ago from supporting Unix server to working with Linux clusters, I never really encountered this issue: you type “reboot”, “init 0″, or “shutdown” as root and… nothing happens. Or the system starts going down but then hangs on unmounting a filesystem or unloading a module. I think this happened once to a colleague of mine who was rebooting a Solaris server, but this is a common problem with Linux.
Working with Linux Driver Modules
You just replaced a failed network card, rebooted your server and now network wouldn’t start and your screen is filled with cryptic error messages about some kernel module doing something it’s not supposed to do. …
Slow SSH login in SuSE Linux
Starting with SuSE 10 and including both openSuSE and SLES an annoying SSH problem appeared. When you SSH to the server (via PuTTY and such) you get the “login” prompts right away, but the “password” …
How to Interview a Unix SysAdmin
“You see,” he explained, “I consider that a man’s brain originally is like a little empty attic, and you have to stock it with such furniture as you choose. A fool takes in all the …
Shell Scripting for HPC Clusters, Part 2
This is the second installment of a multipart guide for beginner Unix sysadmins supporting HPC clusters. You can view the first part of the guide here.
Searching, Replacing, Comparing
Try to work with a large cluster and …
Shell Scripting for HPC Clusters, Part 1
This is the first installment of a multipart guide for beginner Unix sysadmins supporting HPC clusters.
“For” and “While” Loop Constructs
The main challenge of supporting a Linux cluster is ensuring a homogeneous environment. Aside from small …
Controlling Process CPU Utilization
Let’s say there is a process on your Unix/Linux system that sometimes tends to consume all CPU resources and become unresponsive. At the same time, you do not want to terminate the process at the …
Encoding Videos for XBox 360 and PS3
Both Xbox 360 and PS3 support a variety of video codecs and are capable of playing high-definition video files. One of the most popular formats for HD video files is Matroska (MKV), which provides excellent …
Linux and High I/O Wait
When you look at the CPU activity of your computer, one of the parameters is the iowait. This value shows how much time your CPU wastes while it is waiting for I/O operations for complete. …
Sharing Videos from Linux to Xbox 360
Xbox 360 uses UPnP protocol to stream multimedia files from computers on your home network. Normally, you would have a Windows PC running WMP and sharing files. But what if you have a Linux box …
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