phpunit command not found in Centos 5.5

Yii 1.1 Installation and Setup
1

How do I get the command phpunit in linux? I stuck at chapter 3 page 47 to run "phpunit functional/SiteTest.php"

Thanks

2

I found the solution. Need to add 2 more channels

pear channel-discover components.ez.no and pear channel-discover pear.symfony-project.com

Thanks