KMail Crashing and LIBGL

One problem I’ve had recently on two systems with NVideo video cards is KMail crashing (SEGV) while reading mail. Sometimes it goes for months without having problems, and then it gets into a state where reading a few messages (or sometimes reading one particular message) causes a crash. The crash happens somewhere in the Mesa […]

WordPress Multisite on Debian

WordPress (a common CMS for blogs) is designed to be copied to a directory that Apache can serve and run by a user with no particular privileges while managing installation of it’s own updates and plugins. Debian is designed around the idea of the package management system controlling everything on behalf of a sysadmin.

When […]

QEMU for ARM Processes

I’m currently doing some embedded work on ARM systems. Having a virtual ARM environment is of course helpful. For the i586 class embedded systems that I run it’s very easy to setup a virtual environment, I just have a chroot run from systemd-nspawn with the --personality=x86 option. I run it on my laptop for my […]

More KVM Modules Configuration

Last year I blogged about blacklisting a video driver so that KVM virtual machines didn’t go into graphics mode [1]. Now I’ve been working on some other things to make virtual machines run better.

I use the same initramfs for the physical hardware as for the virtual machines. So I need to remove modules that […]

Video Mode and KVM

I recently changed my KVM servers to use the kernel command-line parameter nomodeset for the virtual machine kernels so that they don’t try to go into graphics mode. I do this because I don’t have X11 or VNC enabled and I want a text console to use with the -curses option of KVM. Without the […]

Ethernet Interface Naming With Systemd

Systemd has a new way of specifying names for Ethernet interfaces as documented in The Debian package should keep working with the old 70-persistent-net.rules file, but I had a problem with this that forced me to learn about

Below is a little shell script I wrote to convert a basic 70-persistent-net.rules (that only […]

BTRFS Status April 2014

Since my blog post about BTRFS in March [1] not much has changed for me. Until yesterday I was using 3.13 kernels on all my systems and dealing with the occasional kmail index file corruption problem.

Yesterday my main workstation ran out of disk space and went read-only. I started a BTRFS balance which didn’t […]

Swap Space and SSD

In 2007 I wrote a blog post about swap space [1]. The main point of that article was to debunk the claim that Linux needs a swap space twice as large as main memory (in summary such advice is based on BSD Unix systems and has never applied to Linux and that most storage devices […]

Is Portslave Still Useful?

Portslave is a project that was started in the 90’s to listen to a serial port and launch a PPP or SLIP session after a user has been authenticated, I describe it as a “project” not a “program” because a large part of it’s operation is via a shared object that hooks into pppd, so […]

Hetzner now Offers SSD

Hetzner is offering new servers with SSD, good news for people who want to run ZFS (for ZIL and/or L2ARC). See the EX server configuration list for more information [1]. Unfortunately they don’t specify what brand of SSD, this is a concern for me as some of the reports about SSD haven’t been that positive, […]