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Tuesday, November 30, 2010

best vi vim macvim command reference

I have recently started using MacVim for my Ruby stuff I write for fun. It is amazing things you can do using this text editor combined with all those plugins.

I installed Janus version ( of MacVim and turned it to a proper IDE for ruby code.

I found this website that has absolutely everything about vi - best VI reference:

I use Janus on Linux as well and works perfectly as well.



Monday, November 22, 2010

Java Sun JDK 1.5 or 1.6 no Ubuntu 10.10 or 11.04 (updated: 01 Jun 2011)

As we know, Java 1.5 has not been maintained anymore and Java 6, has been hanging around for a while and Java 7 is coming soon. But it doesn't mean everybody has to move on to Java 1.6. The problem in Ubuntu is they force you to use OpenJDK. Worse yet, they don't let you downgrade to 1.5.

There are lots of legacy systems running on Java 5 and we can't forget that. It is also about freedom of choice. If you want to install Sun JDK 5 or 6 Ubuntu should not make your life difficult.

Ubuntu 10 and 11 don't allow us to natively (or easily) install Sun JDK's via apt-get.

It is so frustrate when we try to install it on Ubuntu 10.10 and have no luck:

sudo apt-get install sun-java5-jdk (or sudo apt-get install sun-java6-jdk)

After installed, the JDK will go to this directory: /usr/lib/jvm/java-6-sun

You can see all JDK's installed running the following command:

sudo update-java-alternatives -l

After a while, finally got the solution for this:

sudo add-apt-repository "deb jaunty multiverse"

sudo add-apt-repository "deb jaunty-updates multiverse"

sudo apt-get update

sudo apt-get install sun-java5-jdk

Check it out just to confirm:

sudo update-java-alternatives -l

The commands above worked for me in Ubuntu 10 and 11, installing Sun JDK 1.5 and 1.6.
If it doesn't work, try to add the following repositories and repeat the process: (anonymous suggestion - thanks a lot):

sudo add-apt-repository "deb hardy multiverse"
sudo add-apt-repository "deb hardy-updates multiverse"