I just needed to add additional ip addresses onto a network interface and wanted to do this without rebooting the server. I found the best way was just to bring the interface up and down:
sudo ifdown -a
Then bring the interface backup.
sudo ifup -a
How to upgrade / fix Ubuntu openssl heartbleed bug
If you read the heartbleed.com website – it suggested the Ubuntu is not secure because there are still using openssl 1.0.1f. If your Ubuntu computer is up to date then it is secure. Ubuntu have back ported the changes from openssl 1.0.1g to 1.0.1.f.
i.e. just: apt-get update && apt-get upgrade
How to update Ubuntu to 14.04 from the command line
If you are running an Ubuntu Server and would like to upgrade to the Ubuntu 14.04 from the command line here are the commands all changed together for easy cut and paste.
sudo apt-get install update-manager-core && sudo do-release-upgrade -d
Media Wiki /var/www/includes/db/Database.php: DatabaseBase::factory no viable database extension found for type ‘mysql’
I just upgraded Ubuntu and unfortunately the MediaWiki installation broke. There was no debugging output on the screen (for obvious security reasons). So, I just had a blank page on the screen.
The first thing that I did was show the debugging output but editing the LocalSetting.php to enabling
$wgShowExceptionDetails = true;
After refreshing the page, the error appeared as
/var/www/includes/db/Database.php: DatabaseBase::factory no viable database extension found for type 'mysql'
It turns out the problem was php not connecting to MySQL properly.
sudo php5enmod mysql sudo service apache2 restart
How to remove Ubuntu Landscape Client *
I have started to remove the Ubuntu / Cannonical Landscape Client from all my Ubuntu servers because otherwise it is just another service:
- Running in the background using power
- Potiential security hole with root permission
- I don’t actually use it
It is quite simple:
sudo apt-get remove landscape-client landscape-client-ui landscape-client-ui-install landscape-common
If Cannonical open sourced the service for Landscape then I would actually start using it but in the meantime…
Strange Conveyor User Ubuntu
I have just been looking at the processes on my laptop and noticed a python process running as a user called ‘conveyor’. I can’t remember adding a user or installing a program called conveyer. It turns out that it was a Makerbot process. So, a quick…
apt-get remove makerbot*
…helped sort that out. Why Makerbot doesn’t make a user called Makerbot, I have no idea.
Linux Voice – 2nd issue has just been released…
Another awesome issue of Linux Voice. I can highly recommend subscribing.
How to extend / increase a Windows Partition on KVM QEMU VM
We have a Windows 7 VM running on Ubuntu KVM. I needed to give the Windows 7 machine more disk space. This turns out to be really easy (when you know how).
Step 1 – Shutdown the VM
virsh shutdown hostname
Step 2 – Increase the qcow2 image
Find the qcow2 file of the VM and take a backup (just in case).
cp hostname.qcow2 hostname.qcow2.backup qemu-img resize hostname.qcow2 +100GB
Step 3 – Start the VM
Now start the VM.
virsh start hostname
Step 4 – Extend the partition in Window
Windows has a really good partition management utility built into it. Search for “disk management”
Then select the partition, right click and choose extend partition. You should then follow the simple steps and you are done.
Let me know if you have any improvements to this.
How to convert a .png to .ico file Ubuntu Linux
I needed to create a .iso file to make a Windows icon. You need to use icotool which is part of icoutils.
apt-get install icoutils
Then:
icotool -c -o launcher_icon_128.ico launcher_icon_128.png
Job done.
How to install png2icns on Ubuntu
ng2icns is a great little tool for creating Mac icons on Linux. It comes in the the incsutils package:
sudo apt-get install icnsutils