Install MySQL under Linux "ls:/var/lib/mysql/*.pid: No that file or directory"

Environment

RedHat Linux 9 + vwware 8.0 + SSH 3.2.9 + Putty 0.62 + MySQL 3.2 + MySQL 5.5

Problem

Linux install MySQL under the following error:

Warning:mysql-server-5.5.28-1.linux2.6.i386.rpm:v3 DSA 

Signature:nokey, key ID 5072e1f5     
preparing ...                                                            

########################################### [100%] You     
have more than one PID file:     
ls:/var/lib/mysql/*.pid: No that file or directory please     
check which one (if any) corresponds to a running server and     
delete all others before repeating t He MySQL upgrade.     
Error:%pre (mysql-server-5.5.28-1.linux2.6) scriptlet failed, exit 

status 1 
error:   Install:%pre Scriptlet failed (2), skipping mysql-server-

5.5.28-1.linux2.6

Solve

Tried to add parameters-nodeps, restart Linux, not fruit. Pending resolution. I also ask you to enlighten me.