How to install only security patches from the command line on Debian and Ubuntu

Did it ever happen to you that you have to upgrade a server to the latest available security packages only to find out – for whatever reason – that there are way to much packages in the pipe? Doing a complete upgrade might break things… But security packages have to be applied, of course. „How to install only security patches from the command line on Debian and Ubuntu“ weiterlesen

Firewall in Proxmox OpenVZ Container

If you set up an OpenVZ container and would like to add a firewall you might run into issues. Unlike as in fully virtualized environments with KVM your isolated container depends on the host kernel. Access to kernel features and certain modules is configured per container on the host.

Let’s say you created your container based on a Ubuntu template. It’s only natural that you would want to use the ufw front-end for managing your iptables. But it won’t work as expected.

„Firewall in Proxmox OpenVZ Container“ weiterlesen

Chrome moniert eine veraltete Flash-Player-Version (Ubuntu / Linux)

Eine meiner Chrome-Browser-Installationen wurde anstrengend: Auf nahezu jeder Seite, die Flash einsetzt – vermutlich auch eine hohe Anzahl, die einfach nur Flash Cookies bzw. Local Shared Objects setzen und nutzen – kam die Meldung, dass der Player veraltet sei. Beim anschließenden Blick auf die Adobe-Seite kann man nur zur Kenntnis nehmen, dass man doch die aktuelle Version benutzt. Des Rätsels Lösung…

„Chrome moniert eine veraltete Flash-Player-Version (Ubuntu / Linux)“ weiterlesen

Convert .webm file to AVI (and others)

A nice feature of GNOME3 is that you can easily create a simple screen recording by pressing Shift-Ctrl-Alt-R (and again to finish the video).

The video file is then located below ~/Videos/ as a .webm file ( The result is a very compact, high resolution video.

If you want to convert the file to another format, simply use ffpmeg, like

ffmpeg -i VIDEO.webm VIDEO.avi