http://www.dsj.za.net sleep 8h; cat /dev/urandom > /dev/dsp Mon, 15 Feb 2010 20:18:08 +0000 http://backend.userland.com/rss092 en Virtualisation has moved on from being a fad to being a mature, established platform. Before virtualisation became popular, you could only get shared hosting or dedicated hosting. Shared hosting is cheap but you have no control over how the physical server is configured. Dedicated hosting is expensive but far more ... http://www.dsj.za.net/linux/virtualisation-in-laymans-terms/ I, like most people who like to test out new website applications/scripts or do some personal dev work, have a webserver installed on my computer. A grumbling I've heard often (most recently was last night, at the time of writing) is that they always have to have the script in ... http://www.dsj.za.net/linux/setting-up-domains-on-your-computer-for-development-work/ By default, Postfix doesn't log the subject lines of emails that it handles. There's nothing wrong with this, however sometimes a user will want to know if an email came in (or was sent), and you'll almost never have the message ID on hand to search for. Luckily, Postfix does allow ... http://www.dsj.za.net/postfix/how-to-log-email-subject-lines/ I have a couple of Ubuntu 8.04 OpenVZ VPSes, and I use the Deny Hosts script to block hackers trying to bruteforce SSH. However, the other day I noticed two files in /var/ on one of my VPSes: logauth.log and logmail.err. Logauth.log was sitting at 105 megabytes! Not only ... http://www.dsj.za.net/linux/ubuntu/openvz-ssh-doesnt-log-to-auth-log-file/ The annoying thing about Ubuntu's version of Sarg is that the cronjobs used to generate the reports are buggy - the weekly and monthly jobs only show some of the days :( Here is how I fix it. It's not difficult at all, really, as you're only modifying the contents ... http://www.dsj.za.net/linux/ubuntu/setting-up-sarg/ One of our clients requested that we block specific email attachments that come in - their large network was starting to suffer under the storm of non-work emails flying around the company - funny video clips, songs, etc, etc. Not only that, several gullible people had infected their PCs with ... http://www.dsj.za.net/linux/block-attachments-in-postfix/ This is a nice quick one. I run an Ubuntu quad-core at home and I was looking to find a way to get it to start faster by making use of the multiple cores better. So, I was looking through /etc/init.d/rc, which is a config file for the program that ... http://www.dsj.za.net/linux/ubuntu/make-ubuntu-start-up-faster-on-multi-core-computers/ Ever since Ubuntu 7.10, my sound in Ubuntu has been very muted. Normally I just shrugged and jacked the volume up, however recently I was forced to use headphones to hear my music and I noticed that the sound was unbearably soft. I did a bit of looking around, and ... http://www.dsj.za.net/linux/ubuntu/is-your-sound-very-soft-in-ubuntu/ I'll Be Back Unfortunately, my old host went and deleted the site for no apparent reason and there aren't any backups. As such, I'm moving the site to a new host and am recovering as much data as possible. Please bear with me while I sort this out. I couldn't recover a lot ... http://www.dsj.za.net/uncategorized/oh-bother/