Skip to content

Allan - OnDemand Posts

Installing Linux Mint/Ubuntu desktop edition with full-disk encryption and LVM

(This guide applies to any Debian/Ubuntu based distribution)

For some reason (complexity perhaps) it is not possible to configure full-disk encryption and LVM from the graphical installer in the desktop edition. It is possible to select full-disk encryption but this only creates one filesystem (root).

I want to use LVM to allow me to have more than one filesystem without having to enter more than one password during boot-up. It is not impossible to install Ubuntu desktop (or Linux Mint as in this guide) with encryption and LVM but it does require a little more work.

Using WordPress plugin CodeColorer under PHP 7

I decided to upgrade my web server containers to PHP 7 but ran into a problem with WordPress, all articles had no text. The problem seemed to be within the plugin CodeColorer since disabling it resolved the problem PHP Warning:  preg_replace(): The /e modifier is no longer supported, use preg_replace_callback instead in /var/www/wp-content/plugins/codecolorer/codecolorer-core.php on line 50 In wp-content/plugins/codecolorer/codecolorer-core.php locate this code block:   /** Search content for code tags and replace it */   function…

Moving virtual machines from KVM to ESXi 6.0

I’ve been running KVM for quite a while on my lab server. It’s been running without issue but with the release of vSphere/ESXi 6.0 I felt it was time to move back to VMware. I wanted to preserve the virtual machines already running so I set out to move these to ESXi. I ran into some issues which I’m not sure is a generic problem or specific to ESXi 6.0 but I’ll describe what I…

Random desktop background from command line

As mentioned in my previous post i synchronize my wallpaper folder between my desktop computers. While the are various ways of setting a random desktop background (XFCE – which I use – has this built in), I’ve had to conclude it’s just easier from the command line. In XFCE it is not possible to do this from cron it seems, so I made a script which is run at start-up: #!/bin/bash IFS=’ ‘ DIR="$HOME/etc/wallpaper" while true  do…

Desktop wallpapers

My collection – Enjoy. (This is the same folder I use for randomized backgrounds on my computers)

Wake on WAN using OpenWRT 12.09

If you have the need to wake up machines on your local LAN from the outside, there are a few steps you need to take to get it working with OpenWRT (12.09) Select an unused IP address (which you are certain will never, ever be used). I will be using 192.168.1.254 in the following Log into OpenWRT and go to System → Startup → Local Startup (the text input at the bottom of the page) and…

Installing and running Copy.com agent on a headless (Ubuntu/Debian) Linux

I’ve started to use copy.com instead of services like Dropbox, SpiderOak and similar.

Why? Because it’s fast (unlike Dropbox), it’s simple (unlike SpiderOak) and it’s able to run on all major platforms (Windows, OSX, Android, iOS and Linux, both graphical and console. Both are native Linux application).

This article explains how to install the agent on Linux – more specifically how to run the console agent on a Ubuntu-derived distribution.

nowhere.dk outage 2013-03-03

Nowhere.dk (the entire domain) was offline today from 09:47 to 10:46 UTC follwing a major outage at Cloudflare.com. Points to Cloudflare.com for releasing a full incident report.

IPv6 with tunnelbroker.net, ChicagoVPS and Ubuntu

I have recently moved my hosting to a couple of VPSes at ChicagoVPS and wanted to use IPv6 (via tunnelbroker.net) ChicagoVPS uses OpenVZ which presents a couple of problems $ ifconfig sit0 sit0: error fetching interface information: Device not found $ sudo modprobe ipv6 FATAL: Module ipv6 not found. It turns out, this is a fairly common problem though OpenVZ is supposed to support IPv6. Luckily, someone made a small userland program (tb-tun, which “tunnels”…

iptables on a ChicagoVPS (OpenVZ) VPS

iptables is not always easy to deal with so I prefer to use Uncomplicated firewall (ufw) in Ubuntu, because it simplifies configuring and maintaining my firewall rules. Unfortunately, ufw does not play nice with OpenVZ containers so I decided to find something else. In the end (after testing various things) I decided to install the package iptables-persistent which is not as sexy as ufw but gets the job done. iptables-persistent uses two configuration files /etc/iptables-persistent/rules.v4…

Page optimized by WP Minify WordPress Plugin