Archive for the ‘informational’ Category

Opera-Developer working on Fedora 20

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Not a huge fan of the new Opera, however I’m able to get the long-awaited Linux version (for which only a .deb package was released) working on Fedora after some hackery. Below is a screenshot of it. I just thought I’d share my slight happiness with the rest of the interwebs 🙂

Opera-Developer running on Fedora 20

Opera-Developer Screenshot

Ubuntu fonts in Fedora

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I recently install Fedora 20 on my laptop (I’d been using Arch Linux for the longest, but decided to switch it up for no real reason). I initially installed Mageia, and loved it for what it was — the first linux distro I ever used was a Mandriva iteration — but it’s stability and older set of packages did not meet my needs. Namely, I needed ZFS support (to access a drive I’d used with FreeBSD) along with a few other nuances that the newer F20 system allowed over the Mageia 4 system I was using.

After the move to Fedora, I wanted to use the Ubuntu fonts that I’d grown accustom to while using Arch Linux. It would seem, however, that Fedora does not have an up-to-date package for these fonts in their repo. A quick search at showed that there was an Ubuntu font package in the Russian repo (, however it did not include Ubuntu Mono, among others — unless I’m mistaken.

Fortunately, Ubuntu offers a standalone download of their fonts here. Installing the fonts directly was very simple. After downloading and unzipping the zip file, simply move the contents to /usr/share/fonts, and run fc-cache -v.

Afterwards, I was able to use Ubuntu Mono w/Konsole, as I love to do 🙂

Enabling UFS r/w support in Ubuntu 12.04 LTS

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Continuing my work with servers running Ubuntu, I’ve come across the issue of needing the ability to write to UFS filesystems via libguestfs. I was doing a lot of head-banding against various walls, until I came across this post (thanks a lot Oz Nahum!).

R/W support is *experimental*, you’ve been warned.

First create the build directory and download the source for your kernel:

sudo su -
apt-get build-dep --no-install-recommends linux-image-$(uname -r)
mkdir /usr/local/src/ufs_rw
cd /usr/local/src/ufs_rw
apt-get source linux-image-$(uname -r)
cd linux-3.x.y-z
cp -v /usr/src/linux-headers-3.x.y-z/Module.symvers .
cp -v /boot/config-3.x.y-z .
make EXTRAVERSION=-4 O=/usr/local/src/ufs_rw  oldconfig
sed -i 's/# CONFIG_UFS_FS_WRITE is not set/CONFIG_UFS_FS_WRITE=y/' /usr/local/src/ufs_rw/.config

Continue compiling:

make EXTRAVERSION=-4 O=~/ufs_rw prepare
make EXTRAVERSION=-4 O=~/ufs_rw outputmakefile
make EXTRAVERSION=-4 O=~/ufs_rw archprepare
make EXTRAVERSION=-4 O=~/ufs_rw modules SUBDIRS=scripts
make EXTRAVERSION=-4 O=~/ufs_rw modules SUBDIRS=fs/ufs

You’ll find your module here: /usr/local/src/ufs_rw/linux-[version]/fs/ufs/ufs.ko. From there, you can just copy the file to /lib/modules/3.x.y-z/kernel/fs/ufs — I preferred to rename the original to ‘’ vs. overwriting it.

Now with a modprobe ufs you’ll have UFS support loaded with r/w support!

Ubuntu 12.04, apparmor and libvirt live external snapshots

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So I was running into an issue where our Ubuntu machines would not allow live external snapshots via libvirt virsh snapshot-create-as "" --diskspec vda,file= --disk-only. *Note the lack of the “–atomic” option, which is certainly recommended in a mission-critical environment, as it ensures the snapshot completely correctly and dies if it does not — this is due to running an older version of libvirt (0.9.8) because we’re using Precise Pangolin.

agoree@computing-node-3:/var/lib/libvirt/images$ virsh snapshot-create-as fedora-guest2 snap1-fedora-guest2 "1st virsh snap of fedora-guest2" --diskspec vda,file=/var/lib/libvirt/images/snap2-fedora-guest2.img --disk-only
error: internal error unable to execute QEMU command 'blockdev-snapshot-sync': An undefined error has ocurred

The error lead me to this bug report, along with these helpful blog posts.

I ended up simply creating this file:

agoree@computing-node-3:~$ cat /etc/apparmor.d/local/abstraction-libvirt-storage 
"/var/lib/libvirt/images/*" rw,

Then added an include for it in /etc/apparmor.d/libvirt/TEMPLATE, like so:

agoree@computing-node-3:~$ cat /etc/apparmor.d/libvirt/TEMPLATE 
# This profile is for the domain whose UUID matches this file.

#include <tunables/global>

  #include <abstractions/libvirt-qemu>
  #include <local/abstraction-libvirt-storage>

After a reboot, all worked fine. Next up, using a newer libvirt version on Precise Pangolin for better live snapshot support (namely, “–atomic” option and “virsh blockpull” command to consolidate imgs/snaps).