Since VMWare made their Server available at no cost this has risen to be an highly interesting alternative for virtualisation. Anyone can download it from their website and get serials for free. This is highly mature software and is rather easy to install. However, on 64-bit Systems there are a few caveats. If you happen to have the problem that VMWare won’t accept your serials, than you have to install the ia32-libs package. Also see the comments on this howto.
When you did successfully install VMWare, you probably want to provide your VMs with network connecitivity. There are several ways to achieve this and the approach depends on how you use your servers.
Interface Aliases: http://www.derkeiler.com/Mailing-Lists/securityfocus/focus-linux/2002-01/0094.html
Routing: Use Host-only network
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| iptables -t nat -A POSTROUTING -s 192.168.2.0/24 -o eth0 -j MASQUERADE
iptables -A INPUT -i vmnet1 -s 192.168.2.0/24 -j ACCEPT
iptables -A FORWARD -i eth0 -o vmnet1 -j ACCEPT
iptables -A FORWARD -o eth0 -i vmnet1 -j ACCEPT
iptables -t nat -I PREROUTING -p tcp -d <external -ip> -i eth0 --dport </external><external -port> -j DNAT --to <internal -ip>:</internal><internal -port></internal></external> |
Sometimes the world is cruel. Although most of the applications I use from day to day are open source its not easy to exchange metadata between those programs. Sometimes I switch my music player. Usually I switch between Amarok and Rhythmbox. But since I heavily rely on the Metadata, especially my song ratings, this can get very frustrating. Most of the metadata is stored within the MP3 files but the most important ones are not. After some searching around it looked like there is no proper solution to synchronize the metadata of my favourite music players. There are some approaches to import the music library from iTunes but it looks like nobody did ever want to do a two-way synchronization between Amarok and Rhythmbox.
After looking at the metadata formats (XML for Rhytmbox, MySQL for Amarok) I did start my own synchronization script. Right now it is working but needs some more polishing or it could eat your kittens.
Grab the script from Bifröst.
I’ve discovered reStructured Text some time ago and have been using it since then for several tutorials, like the ISP Mailserver or the Rootserver ones.
http://docutils.sourceforge.net/docs/user/rst/quickref.html
I’d suggest to have a look at those if LaTeX would be too much of an overkill.
Published on
April 17, 2009 in
Linux.
Upgrades of the xserver packages have been corrupting my manual Nvidia driver (the proprietary blob version) for a long time. It looks like there is a feasible alternative: dpkg-divert. I’d saved myself from much hassle if I’d RTFM, but this is how live goes.
This two commands should help:
dpkg-divert –local –add /usr/lib/libGL.so
dpkg-divert –local –add /usr/lib/libGL.so.1
Published on
April 17, 2009 in
Linux.
Some files are hard to “catch” because of strange filenames. In this cases it’s best to remove them by their inodes.
Get the inode with “ls -i” and remove the file with this command:
find . -inum [inode-number] -exec rm -i {} \;
Published on
Februar 26, 2009 in
KDE and Linux.
Since the features of KDE4 were announced I was eager to try out the promised semantik desktop. Since I’ve been working on onologies once, I know that it is a great idea, but sometimes difficult to implement. So I wanted to see how the KDE guys did implement this. Sadly it didn’t work on Debian very well since the Debian packagers, did not – for some very good reasons – package the sesame2 backend for nepomuk which is required to get the most out of strigi/nepomuk. Today I was thinking about nepomuk again and was lucky to find a very good explaination how to get sesame2 for nepomuk running on Debian sid with KDE4.2 form experimental. The post I found is in german, so I’ll give a quick summary of what I’ve done here:
- First you should get your system up-to-date: apt-get update && apt-get upgrade
- Then install the required packages: apt-get install libqt4-dev build-essential cmake subversion qmake strigi-utils sun-java6-jdk sun-java6-jre
- I prefer sun-java6, but you could also use openjdk-6-jre and openjdk-6-jdk instead.
- Now checkout the kdesupport sources: svn co svn://anonsvn.kde.org/home/kde/tags/kdesupport-for-4.2/kdesupport
- Change to the source directory: cd kdesupport/soprano
- Create the build directory for cmake: mkdir build
- Go into the build dir: cd build
- Now you have to properly set JAVA_HOME: export JAVA_HOME=/usr/lib/jvm/java-6-sun, use /usr/lib/jvm/java-6-openjdk for openjdk
- Create the makefiles: cmake ..
- This should emit something like this:
---------------------------------------------------------------------------------------
-- Soprano Components that will be built:
* Sesame2 storage backend (java-based)
-- Soprano Components that will NOT be built:
* Redland storage backend
* Raptor RDF parser
* Raptor RDF serializer
* The CLucene-based full-text search index library
---------------------------------------------------------------------------------------
-- Configuring done
-- Generating done
- Now compile using make: make
- And install: sudo make install. Please note that this will install the backend into /usr/local.
- Then you should (re-)move your old redland repository: rm -rf ~/.kde4/share/apps/nepomuk. You’ll loose all your existing metadata (tags, ratings, etc.) this way. So maybe you want to backup this information instead.
- You should stop strigi and nepomuk now in the system settings dialog of KDE.
- Then edit the configuration file in ~/.kde4/share/config/nepomukserverrc with your favourite editor and change it like this:
[Basic Settings]
Configured repositories=main
Start Nepomuk=true
[Service-nepomukmigration1]
autostart=false
[Service-nepomukstrigiservice]
autostart=true
[main Settings]
Storage Dir[$e]=$HOME/.kde4/share/apps/nepomuk/repository/main/
Used Soprano Backend=sesame2
rebuilt index for type indexing=true
- Now you can enabled nepomuk and strigi again. Strigi should display an icon in the system area and you should see /usr/bin/nepomukservicestub nepomukstorage eating up a lot ressources.
Of course you can use aptitude instead of apt-get if you like.
It seems as if the release-cylce of the next stable release of Debian, called lenny, will soon come to an end. The planned release date is the weekend around the 14th februar.
Let’s hope everything works out as planned …
Today Qt Software made an very important announcement: They are going to release Qt 4.5 with an additional license option: the LGPL. This means that Qt can be used in closed-source-software (and more restrictive OSS licenses) without paying royalties to Qt Software. This is great news. I hope that now there will be a SWT-Qt binding for eclipse which could improve the speed and responsiveness of eclipse by an order of magnitude (if it’s done right).
This is very, very promising.
It’s been a long time since the last post … Finally I’ve got something to say, again 
For some time now I’m using the KDE4.2beta packages for Debian from kde42.debian.net and they work very well. Much better than KDE 4.1 from experimental. Today I tried upgrading my system and the package management tried to remove my whole KDE 4 installation. After some digging around I found out that libstreamanalyser0 held back kdelibs5 from being upgraded and due to unsatisfied dependencies the whole KDE installation was going to be removed. After upgrading libstreamanlyser0 by hand and some other packages, everything is fine again.
VirtualBox’s NAT code doesn’t forward ICMP packets. Remember when you try to ping some destination from inside the virtual machine, this won’t work. See here for more information in german.
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