背景：
redhat7.9 搭建RAC的时候，执行命令检查
./runcluvfy.sh stage -pre crsinst -n fengdun-oracle001,fengdun-oracle002 -verbose
Performing pre-checks for cluster services setup
Checking node reachability...
Check: Node reachability from node "fengdun-oracle001"
Destination Node Reachable?
fengdun-oracle002 yes
fengdun-oracle001 yes
Result: Node reachability check passed from node "fengdun-oracle001"
Checking user equivalence...
Check: User equivalence for user "grid"
Node Name Status
fengdun-oracle002 failed
fengdun-oracle001 passed
Result: PRVF-4007 : User equivalence check failed for user "grid"
WARNING:
User equivalence is not set for nodes:
fengdun-oracle002
Verification will proceed with nodes:
fengdun-oracle001
一开始以为是ssh互信做的有问题，于是仔细的检查了一下，发现没有问题，于是又重新做了一次ssh互信，发现还是不行。于是官网上查了一下，好像是和openssh版本太高有关系
当前openssh版本是：
于是我们降配：
再次执行发现校验就通过了