root@linux3 [~]# yum update
Setting up Update Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
Finished
No Packages marked for Update/Obsoletion
root@linux3 [~]# yum install vnc2server
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Excluding Packages in global exclude list
Finished
Parsing package install arguments
No Match for argument: vnc2server
Nothing to do
root@linux3 [~]# vncserver
vncserver: couldn't find "xauth" on your PATH.
root@linux3 [~]#