Category: OS and Systems Administration
20/03/10
07:49:00 am, by richard 
, 322 words 
Categories: Ubuntu Linux, OS and Systems Administration, Filing Systems, Installation and Configuration
HOWTO:Reinstall Grub2 on Ubuntu
You will, not might, need this at some point in time. It will happen to you. :) When you find that grub2 is no longer on your MBR so the system will not boot or even find grub. For example you installed Windows, dumb move, but heh! You may also have clo… more »
25/12/09
06:25:44 pm, by richard , 252 words
Categories: Ubuntu Linux, OS and Systems Administration, Network and Connectivity, Virtual Machines
HOWTO: Startup and Connect to a Remote VirtualBox Machine
Ok, so you have a working VBox machine and you want to run it on a host server, This allows you to connect to it remotely.To make the remote connect a little more secure you can stop any old person connecting in with out authentication by configuring… more »
16/12/09
06:59:43 pm, by richard , 95 words
Categories: Ubuntu Linux, OS and Systems Administration, Filing Systems
HOWTO: Remove RAID Arrays
The filesytem should not be mounted.[khakisample pre="1"]sudo umount /dev/md0[/khakisample]Stop the array allowing us to remove thew array.[khakisample pre="1"]sudo mdadm --stop /dev/md0[/khakisample][khakisample pre="1"]sudo mdadm --remov… more »
Tags: raid, removing. initrd
06/12/09
03:23:24 pm, by richard , 1195 words
Categories: Ubuntu Linux, OS and Systems Administration, Filing Systems, Installation and Configuration
HOWTO: Expand a RAID 5 by adding another disk
So you already have a RAID 5 array and you want to make it bigger. You can either swap out each disk one at a time for a larger disk or simply add an new disk to the existing array. When I say simply there is a scary bit at the end. [redsample image=… more »
29/11/09
01:50:41 pm, by richard , 186 words
Categories: Ubuntu Linux, OS and Systems Administration, Installation and Configuration
HOWTO: Stop Folding at Home Scaling My CPU
If you use the CPU scaling options that are now a default part of Ubuntu, you will also see that when folding@home runs or any other process that hits the CPU's hard the CPU frequency will jump up a level or two. Folding@home run as a low priority using… more »
