Apache and GeoIP2 module
Often, the Internet can seem like the wild wild west (or the wild wild east, depends on where you are located), and you can be fairly certain that any public facing service will draw some amount of brute force attacks …
Category: Operating systems
Observium alerts not working
I’ve been running an instance of Observium for a couple of years now. I had set it up for the VPS which I’m running this blog on or for my home NAS, it’s really nice to be able to see …
Early RHEL 9/CentOS 9 Stream
Even if it’s still in pre-Beta, it has been publicly known that RHEL 9.0 development is well under way for some time now. But that’s not all there is to it – not only is this information public, the development …
Gnome 3 and ‘switch to workspace 5 and above’ shortcut
As far as desktop environments go, I somehow got stuck in the Gnome 2 days, and when Gnome 3 became a thing, I simply carried on with its fork, Mate. Partially because I was used to it, but more importantly, …
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Disable automatic Flatpak updates
I have to say I feel slightly ambiguous about Flatpak. On one hand, I’m really glad it allows me to run applications like Spotify, Zoom or Skype on my computers in a convenient way. Applications that are not open sourced, …
Upgrade Postgresql from 9.3 to 11
I had to update an already unsupported Postgresql instance running on version 9.3 to the latest version 11. Luckily, this process is quite straightforward and all the hard lifting is done by the postgresql update tool. The only problem there …
RHEL 8 Beta
Beta version of Red Hat Enterprise Linux 8.0 was announced recently. It can be downloaded without any registration, or you can go through the Developers Program and get a subscription for development usage for free. I downloaded the ISO this …
Migration from OpenLDAP 2.3 to 2.4
Note: I wrote this post during Christmas break 2017, but it took me some time before I managed to give it a better form, verify the steps again and publish it. Hence some Xmas references in a text published during …
Debian buster and wake on lan
For quite some time, I used to have a low-end motherboard that didn’t support Wake on LAN. So when I left for work or holiday, I would usually leave my home PC on, because sometimes I just needed to access …
KVM: Cannot find any matching source devices for logical volume group vg2
I installed Centos 7 on a brand new machine about a half a year ago, and set up KVM with two data pools – one just a regular directory for old raw images, the second being an LVM volume group. …
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