[Seo-man]

Пробуем
yum install perl-DBD-MySQL-3.0007-2.el5.x86_64

На экране:
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* base: centos.psw.net
* extras: centos.psw.net
* updates: centos.vieth-server.de
Excluding Packages in global exclude list
Finished
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package perl-DBD-MySQL.x86_64 0:3.0007-2.el5 set to be updated
--> Proce..ing Dependency: libmysqlclient.so.15(libmysqlclient_15)(64bit) for package: perl-DBD-MySQL
--> Proce..ing Dependency: libmysqlclient.so.15()(64bit) for package: perl-DBD-MySQL
--> Finished Dependency Resolution
perl-DBD-MySQL-3.0007-2.el5.x86_64 from base has depsolving problems
--> Mi..g Dependency: libmysqlclient.so.15()(64bit) is needed by package perl-DBD-MySQL-3.0007-2.el5.x86_64 (base)
perl-DBD-MySQL-3.0007-2.el5.x86_64 from base has depsolving problems
--> Mi..g Dependency: libmysqlclient.so.15(libmysqlclient_15)(64bit) is needed by package perl-DBD-MySQL-3.0007-2.el5.x86_64 (base)
Error: Mi..g Dependency: libmysqlclient.so.15(libmysqlclient_15)(64bit) is needed by package perl-DBD-MySQL-3.0007-2.el5.x86_64 (base)
Error: Miss.g Dependency: libmysqlclient.so.15()(64bit) is needed by package perl-DBD-MySQL-3.0007-2.el5.x86_64 (base)
You could try using --skip-broken to work around the problem
You could try running: package-cleanup --problems
package-cleanup --dupes
rpm -Va --nofiles --nodigest
The program package-cleanup is found in the yum-utils package.