oracle 官方建议在安装oracle grid前运行此脚本，来检查各个节点是否满足grid安装的官方要求：

如果是自己的测试环境，部分‘unpassed’可以忽略。

[grid@vrh5 grid]$ sh runcluvfy.sh  stage -pre  crsinst -n vrh5,vrh6

Performing pre-checks for cluster services setup

Checking node reachability...
Node reachability check passed from node "vrh5"

Checking user equivalence...
User equivalence check passed for user "grid"

Checking node connectivity...

Checking hosts config file...

Verification of the hosts config file successful

Node connectivity passed for subnet "192.168.1.0" with node(s) vrh6,vrh5
TCP connectivity check passed for subnet "192.168.1.0"

Node connectivity passed for subnet "172.168.1.0" with node(s) vrh6,vrh5
TCP connectivity check passed for subnet "172.168.1.0"

Node connectivity passed for subnet "10.0.4.0" with node(s) vrh6,vrh5
TCP connectivity check failed for subnet "10.0.4.0"

Interfaces found on subnet "172.168.1.0" that are likely candidates for VIP are:
vrh6 eth1:172.168.1.182
vrh5 eth1:172.168.1.181

Interfaces found on subnet "10.0.4.0" that are likely candidates for VIP are:
vrh6 eth2:10.0.4.15
vrh5 eth2:10.0.4.15

Interfaces found on subnet "192.168.1.0" that are likely candidates for a private interconnect are:
vrh6 eth0:192.168.1.183
vrh5 eth0:192.168.1.181

Node connectivity check passed

Total memory check failed
Check failed on nodes:
        vrh6,vrh5
Available memory check passed
Swap space check failed
Free disk space check passed for "vrh6:/tmp"
Free disk space check passed for "vrh5:/tmp"
User existence check passed for "grid"
Group existence check passed for "oinstall"
Group existence check passed for "dba"
Membership check for user "grid" in group "oinstall" [as Primary] passed
Membership check for user "grid" in group "dba" failed
Check failed on nodes:
        vrh6,vrh5
Run level check passed
Hard limits check passed for "maximum open file descriptors"
Soft limits check passed for "maximum open file descriptors"
Hard limits check passed for "maximum user processes"
Soft limits check passed for "maximum user processes"
System architecture check passed
Kernel version check passed
Kernel parameter check passed for "semmsl"
Kernel parameter check passed for "semmns"
Kernel parameter check passed for "semopm"
Kernel parameter check passed for "semmni"
Kernel parameter check passed for "shmmax"
Kernel parameter check passed for "shmmni"
Kernel parameter check passed for "shmall"
Kernel parameter check passed for "file-max"
Kernel parameter check passed for "ip_local_port_range"
Kernel parameter check passed for "rmem_default"
Kernel parameter check passed for "rmem_max"
Kernel parameter check passed for "wmem_default"
Kernel parameter check passed for "wmem_max"
Kernel parameter check passed for "aio-max-nr"
Package existence check passed for "make-3.81"
Package existence check passed for "binutils-2.17.50.0.6"
Package existence check passed for "gcc-4.1.2"
Package existence check passed for "libaio-0.3.106 (i386)"
Package existence check passed for "libaio-0.3.106 (x86_64)"
Package existence check passed for "glibc-2.5-24 (i686)"