今天正好相对比较空闲，全程针对SSH进行测试，并将测试过程记录下来，与大家分享一下。
Part I. 测试前状态收集
1. 数据库版本为11.2.0.4的两节点的RAC，分别是node111g 和node211g
Disconnected from Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Real Application Clusters, Automatic Storage Management, OLAP,
Data Mining and Real Application Testing options
2. 集群状态正常
[grid@node111g ~]$ crsctl status res -t
--------------------------------------------------------------------------------
NAME TARGET STATE SERVER STATE_DETAILS
--------------------------------------------------------------------------------
Local Resources
--------------------------------------------------------------------------------
ora.DATA.dg
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.DGROUP_01.dg
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? OFFLINE OFFLINE node211g
ora.FRA.dg
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.LISTENER.lsnr
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.LISTENER_TEST.lsnr
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.OCR.dg
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.VOTE3D.dg
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? OFFLINE OFFLINE node211g
ora.asm
? ? ? ? ? ? ? ONLINE ONLINE node111g Started
? ? ? ? ? ? ? ONLINE ONLINE node211g Started
ora.gsd
? ? ? ? ? ? ? OFFLINE OFFLINE node111g
? ? ? ? ? ? ? OFFLINE OFFLINE node211g
ora.net1.network
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
ora.ons
? ? ? ? ? ? ? ONLINE ONLINE node111g
? ? ? ? ? ? ? ONLINE ONLINE node211g
--------------------------------------------------------------------------------
Cluster Resources
--------------------------------------------------------------------------------
ora.TEST_SCAN1.lsnr
? ? ? 1 ONLINE ONLINE node111g
ora.cvu
? ? ? 1 ONLINE ONLINE node211g
ora.node111g.vip
? ? ? 1 ONLINE ONLINE node111g
ora.node211g.vip
? ? ? 1 ONLINE ONLINE node211g
ora.oc4j
? ? ? 1 ONLINE ONLINE node211g
ora.orcl.db
? ? ? 1 ONLINE ONLINE node111g Open
? ? ? 2 ONLINE ONLINE node211g Open
ora.orcl.romi.svc
? ? ? 1 ONLINE ONLINE node111g
ora.orcl.test.svc
? ? ? 1 ONLINE ONLINE node211g
? ? ? 2 ONLINE ONLINE node111g
ora.scan1.vip
? ? ? 1 ONLINE ONLINE node111g
3. SSH配置文件，默认SSH端口是22，文件有提及，不建议修改默认值，但是！！！我就想改，怎么办呢？？
[root@node111g ~]# more /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.73 2005/12/06 22:38:28 reyk Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#Protocol 2,1
Protocol 2
#AddressFamily any
#ListenAddress 0.0.0.0
#ListenAddress ::
......
[root@node111g ~]#
[root@node211g ~]# more /etc/ssh/sshd_config
# $OpenBSD: sshd_config,v 1.73 2005/12/06 22:38:28 reyk Exp $
# This is the sshd server system-wide configuration file. See
# sshd_config(5) for more information.
# This sshd was compiled with PATH=/usr/local/bin:/bin:/usr/bin
# The strategy used for options in the default sshd_config shipped with
# OpenSSH is to specify options with their default value where
# possible, but leave them commented. Uncommented options change a
# default value.
#Port 22
#Protocol 2,1
Protocol 2
#AddressFamily any
#Li