yum install lex
Repository updates-released is listed more than once in the configuration
Repository base is listed more than once in the configuration
Setting up Install Process
Setting up repositories
base                      100% |=========================| 1.1 kB    00:00     
updates-released          100% |=========================|  951 B    00:00     
extras                    100% |=========================| 1.1 kB    00:00     
Reading repository metadata in from local files
Parsing package install arguments
No Match for argument: lex
Nothing to do
[root@s15211420 php-5.1.6]# 
[root@s15211420 php-5.1.6]# yum install bison
Repository updates-released is listed more than once in the configuration
Repository base is listed more than once in the configuration
Setting up Install Process
Setting up repositories
Reading repository metadata in from local files
Parsing package install arguments
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for bison to pack into transaction set.
bison-2.0-6.i386.rpm      100% |=========================|  11 kB    00:00     
---> Package bison.i386 0:2.0-6 set to be updated
--> Running transaction check

Dependencies Resolved

=============================================================================
 Package                 Arch       Version          Repository        Size 
=============================================================================
Installing:
 bison                   i386       2.0-6            base              465 k

Transaction Summary
=============================================================================
Install      1 Package(s)         
Update       0 Package(s)         
Remove       0 Package(s)         
Total download size: 465 k