Install MediaWiki from Debian package

 Ubuntu 10.04  No Responses »
May 312010
 

You can install a MediaWiki either by downloading and unpacking the .tar.gz archive and setting it up manually or by using the Debian package mediawiki.

This blog posts describes how to install MediaWiki using the Debian package on Ubuntu:

sudo apt-get install mediawiki

Now uncomment the alias for mediawiki in the config file /etc/mediawiki/apache.conf and restart Apache afterwards:

sudo gedit /etc/mediawiki/apache.conf
sudo apache2ctl restart

Now navigate to http://localhost/mediawiki and configure your Wiki. When you finished the web configuration successfully, a configuration file is created and has to be moved to its correct location:

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React to IP Takeover

 Ubuntu 10.04  No Responses »
May 262010
 

When someone has taken your IP, react!

Set your IP to the correct one (belonging to you):

sudo ifconfig eth0 201.2.16.41 netmask 255.255.255.0

and run arping to get the IP back on your side:

sudo arping -U -c 3 -I eth0 201.2.16.41
sudo arping -A -c 3 -I eth0 201.2.16.41

Also have a look at my ipwatchd blog post on the ipwatch daemon, which can detect IP conflicts.

resources

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Sun Java on Ubuntu 10.04 (instead of Open JDK)

 Ubuntu 10.04  No Responses »
May 202010
 

With Ubuntu 10.04 Lucid Lynx there are no sun-java6-… packages (previously found on multiverse) anymore. They now are part of the repository partner. It’s recommended to uninstall all openjdk packages.

You need the following lines (uncommented) in your /etc/apt/sources.list:

deb http://archive.canonical.com/ubuntu lucid partner
deb-src http://archive.canonical.com/ubuntu lucid partner

And then run on the terminal:

sudo aptitude install sun-java6-jre
sudo update-java-alternatives -l
sudo update-java-alternatives -s java-6-sun
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Downgrade a Package

 Ubuntu 10.04  No Responses »
May 092010
 

https://help.ubuntu.com/community/DowngradeHowto

using Synaptic: Package → Force Version in Synaptic

preferred using aptitude:

apt-cache showpkg libAppA

which will produce an output similar like this:

Provides:
6.5.1-cvs20060628 - libAppA
6.4.1-0ubuntu8 - libAppA

So you can force a certain version like this:

sudo aptitude install PACKAGE=VERSION
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Viewing the Changelog of Ubuntu Packages

 Ubuntu 10.04  No Responses »
May 042010
 

at the command line using aptitude:

aptitude changelog <packagename>

This only works for officially supported packages, so it won’t work for PPAs

alias to see the changelog for all packages that need an update

To see a description of all available updates, I create for myself the following alias in the ~/.bashrc:

alias updatesinfo='aptitude changelog $(sudo aptitude search ~U | cut -c 5- | cut -d" " -f1)'

GUI using Synaptic

System → Administration → Synaptic Package Manager

Find the package you’re interested in using the Search button ([Ctrl]-[F]) and then select Package → Download Changelog from the Synaptic File menu.

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