to use Yahoo! Messenger plus webcam we must install "Gyachi".
Let's try the installation steps.. :)
#step 1
edit source.list
$ sudo gedit /etc/apt/source.list
#step 2
$ sudo gedit /etc/apt/source.list
#step 2
add this into source list:
deb http://ppa.launchpad.net/loell/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/loell/ppa/ubuntu karmic main
and add its gpg key
$ sudo apt-key adv -recv-keys -keyserver keyserver.ubuntu.com 0xc23b005d874996dc8d03a3c0d0d3c959db2035a6
deb http://ppa.launchpad.net/loell/ppa/ubuntu karmic main
deb-src http://ppa.launchpad.net/loell/ppa/ubuntu karmic main
and add its gpg key
$ sudo apt-key adv -recv-keys -keyserver keyserver.ubuntu.com 0xc23b005d874996dc8d03a3c0d0d3c959db2035a6