Originally Posted by sushantbeura
My system is not installed with yum. Is there any other option to install it manually.
Install it from the redhat dvd then. look for a file named tree*.rpm
then use rpm command to install it.
FYI, if your system does not have yum configured then you most probably it's not up to date, and can get attacked ...
if you don't want to pay redhat support, use centos or fedora instead