服务器评测
RHCA 认证介绍：
| RHS333 | Red Hat Enterprise: Network Services | EX333 |
| RH401 | Red Hat Enterprise Deployment and Systems Management | EX401 |
| RH436 | Red Hat Enterprise Clustering and Storage Management | EX436 |
| RH442 | Red Hat Enterprise System Monitoring and Performance Tuning | EX442 |
| RH423 | Red Hat Enterprise Directory Services and Authentication | EX423 |
| RH318 | Red Hat Enterprise virtualization | EX318 |
RH423 和 RH318 二选一即可
