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Unattended boot, Grub, Ubuntu and power failure.

What do these four things have in common? Ubuntu headless server will not boot after power failure as Grub will indefinitely wait for user input. The root of this problem lies inside Ubuntu default Grub configuration as Grub will simply set timeout to infinity when recordfail parameter is set.

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SysOps

How to determine whether the processor supports 64-bit instruction set

If you ever wondered how to determine whether the processor is 64-bit capable, then I have a simple and straight answer for you.

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Ubuntu Pocket Guide and Reference

Ubuntu Pocket Guide and Reference by Keir Thomas is a great book for the beginners as it covers a wide range of topics needed for everyday Ubuntu use. I highly recommend it to anyone who wants to install or try Ubuntu.

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Ubuntu – Nexus 7 basics

I spent all day testing custom roms on Nexus 7 but finally decided to roll back everything and use stock rom with encryption. I will describe here how to unlock device, install recovery image, return to stock rom and root Nexus 7 (Android 4.2) using Ubuntu.

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Ubuntu Precise – Install youtube-dl package using Quantal repo

Ubuntu Precise 12.04 currently contains in repository youtube-dl version 2012.02.27-1. As of recent YouTube changes this package version is not usable anymore but there is an updated version in Ubuntu Quantal 12.10 repository. To use it you need to perform couple of steps described below.

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DevOps

How to generate QR Codes

Quick Response Codes are appearing everywhere. You can see them in museums, near the tourist attractions or all over the web. There is no doubt that QR Codes are useful as they can contain any information within reasonable limits.

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Ubuntu – Unknown encoder libmp3lame

Couple days ago I encountered an audio conversion failed: Unknown encoder ‘libmp3lame’ error when I tried to convert YouTube videos to mp3 format using youtube-dl.

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Ubuntu – How to use persistent encrypted partition

Simple solution using Linux Unified Key Setup.