How to verify the Nodemanager password is working or not?

We can verify the Nodemanager password by using below steps:

$ cd /u01/app/fmw/oracle_common/common/bin
$ wlst.sh
wls:/offline> nmConnect(domainName='test_domain', username='NMUser', password='NMPasswd')
Connecting to Node Manager ...
Successfully Connected to Node Manager.
wls:/nm/test_domain> nmDisconnect()
Successfully disconnected from Node Manager.
wls:/offline> exit()