Solution to find out gstreamer-app for OPENCV

Need install:

$sudo aptitude install libgstreamer-plugins-base0.10-dev

How to stop x server of ubuntu

The solution is writing follow line in the terminal:

$ sudo /etc/init.d/gdm stop

Change the gvim default font

I start to use a new big screen, the default font of vim becomes so small.

I start to search methods that can solve it:
Add follow line to ~/.vimrc:
set guifont=Bitstream\ Vera\ Sans\ Mono\ 12

Here Bitstream\ Vera\ Sans\ Mono\ is the type of the font, and 12 is its size.

Matlab for UBUNTU, errors: Locking assertion failure

This error happens because matlab can not find out the java.
The solution is very simple, add follow line to the ~/.bashrc file:

export MATLAB_JAVA=/usr/lib/jvm/java-6-sun/jre

SVN connection with a different port number

Some times the port to the server has been changed, such that we must change the default port (25) to the new port. Here is the solution:

1. Find out the file ~/.subversions/config
2. Add follow line: sshtunnels=ssh -p newportnummer. Save the file and exit.
3. Checkout the server svn repository by: svn co svn+sshtunnels://hostname@hostip/pathToSvnRepository

That's it.

Let your folders become secret

Under Linux, maybe some files that you don't want to share with others, so the best way is to encrypt the secret files.
Here I introduce a simple way for Ubuntu or other linux users:
First install CFS:
$ apt-get install cfs

Make a folder where you want to keep secret files.
$ cmkdir Secret
Now input your password (At least 16 characters). You have to remember it.

Attach a folder to show the secret context in "Secret" and might add more files to "Secret":
$ cattach Secret tmp
Now input the mentioned password.

Check the context of folder "Secret":
$ cd /crypt/tmp
$ ls

You will see all files that have been encrypted in "Secret", are now shown in "/crypt/tmp".
Now you can add more files in "/crypt/tmp":
$ cp some.txt /crypt/tmp/

After changing the "/crypt/tmp" folder, you have to encrypt the folder:
§ cdetach tmp

Now the folder "/crypt" become empty. However, you can check the encrypted file is added in "Secret" now.

That's it!

Nautilus open folder from terminal

Great command....
You can open current folder from terminal command line....