A security issue affects the following Ubuntu releases:
Ubuntu 6.06 LTS Ubuntu 8.04 LTS Ubuntu 8.10 Ubuntu 9.04 Ubuntu 9.10
sudo vulnerabilities
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[Howto] Introduction to Puppet
The administration of a large number of servers can be quite tiresome without a central configuration management. This article gives a first introduction into the configuration management Puppet.
Introduction
Read more »PostgreSQL Optimizer Bits: Semi and Anti Joins
The series “PostgreSQL Optimiser Bits” will introduce the strategies and highlights of the PostgreSQL optimiser. We start today with a new feature of PostgreSQL 8.4: Semi and Anti Joins.
Since version 8.4, PostgreSQL has been offering a new optimisation strategy for the optimisation of certain queries: Semi and Anti Joins.
Read more »High-Availability Storage With GlusterFS On Fedora 12
This tutorial shows how to set up a high-availability storage with two storage servers (Fedora 12) that use GlusterFS. Each storage server will be a mirror of the other storage server, and files will be replicated automatically across both storage servers. The client system (Fedora 12 as well) will be able to access the storage as if it was a local filesystem.
Read more »Diving into WebKit
At the moment, I have mixed feelings. Not about writing blogs. Not about working on WebKit. But about using the new WebKit browser to write the blog entry, haha! I've seen it crash, although in the last days, it has become pretty stable.
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5 of the Best Free Linux Data Recovery Tools
Data recovery is the process of retrieving data from corrupted or damaged storage media when it cannot be accessed. The storage media in question will often be a hard disk, but it can also be removable media such as CDs, DVDs, Blu-rays, and storage tapes. There are many different reasons why a system administrator may need to use data recovery tools.
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Cpulimit - Limit the cpu usage of a process
cpulimit is a simple program that attempts to limit the cpu usage of a process (expressed in percentage, not in cpu time). This is useful to control batch jobs, when you don't want them to eat too much cpu. It does not act on the nice value or other scheduling priority stuff, but on the real cpu usage. Also, it is able to adapt itself to the overall system load, dynamically and quickly.
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Maintain Michael Young’s Xen 4-rc4 src rpm in sync with http://xenbits.xensource.com/xen-unstable
Michael Young wrote xen-4.0.0-0.2.rc4.fc12.src.rpm for Xen-4-rc4 for Fedora 12 to install Hypervisor (changeset 20950).
Read more »GPU Switching Goes For The Gold: Mainline Inclusion
At the start of the month we talked about GPU switching coming to Linux in a crude form that allowed notebooks with dual GPUs (one being a low-power, low-performance integrated chip and the other being the more performance-oriented GPU that's power hungry) to be switched from without the need for a reboot in Linux.
Read more »An Update On The Boot & Power Performance In Ubuntu 10.04
In December we wrote that Ubuntu 10.04 already shortened the boot time, which has been a great focus amongst Canonical and Ubuntu developers as they strive for a ten second boot. A lot has changed since that article.
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Linux 2.6.33 Kernel Released, Woohoo!
Now that Linus Torvalds is done rewiring part of his house, he has put out the Linux 2.6.33 kernel release. This update to the Linux kernel that's coming three months after the release of Linux 2.6.32 delivers the Nouveau DRM GPU code in the staging area, many Radeon KMS improvements and it has left the staging area, the new VMware DRM, and much more.
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Virtual Hosting With Proftpd And MySQL (Incl. Quota) On Ubuntu 9.10
This document describes how to install a Proftpd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine. In addition to that I will show the use of quota with this setup.
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Built to last
It has now been almost exactly five years since kernel development community tentatively started using the git source code management system with the 2.6.12-rc2 commit. That was an uncertain time...
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The insecurity of OpenBSD
I certainly don't mean to imply that OpenBSD is a horribly insecure operating system - it isn't. I do however need to highlight that OpenBSD is quite far removed from a secure operating system, and will attempt to justify this position below.
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Update on Controlling Konsole via DBUS
Recently I wrote about controlling konsole with dbus. As I've begun to use that script for setting up my konsoles I, like others, have discovered that the tab title that you set with dbus doesn't stick. This short note shows you a workaround to make your tab titles stay put.
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