[ubuntu] WARNING gnome-keyring in lubuntu

If you have met the same problem, this maybe help.

Background :

I installed phpunit in my ubuntu 12.04(the os is lubuntu), the installation passed quite well, but when I launch the command in termianl, I got always this warning :

$ phpunit --version
WARNING: gnome-keyring:: couldn't connect to: /tmp/keyring-xAGrk8/pkcs11: No such file or directory
PHPUnit 4.4.5 by Sebastian Bergmann.

[Useful site] Installing lubuntu/LXDE

Unity is the default desktop environment for Ubuntu. But sometimes it is a little heavy for some users like me.

Thierry has recommended LXDE, a lightweight/free desktop environment for Unix-like platform.
With LXDE, the system runs more fluent than before.

To install LXDE, you have just type, and relogin :

sudo apt-get install lxde