nslookup dc02.microsoft.com dc01.contoso.com

nslookup -server <server>

nslookup -server 10.0.0.11

ping <IP address> -t

nltest /dclist:<NetBIOS name of domain>

nltest /dsgetdc:  NetBIOS name of domain

dcdiag /s:<name of DC>

dcdiag /v >c:\temp\<filename>.txt

repadmin /showreps >c:\<filename>.txt

repadmin /showreps * /csv > c:\<filename>.csv

repadmin /sync cn=configuration,dc=contoso,dc=int DC1 e8b4bce7-13d4-46bb-b521-8a8ccfe4ac06 /force /full

@LI:
netdom query fsmo

gplogview -o gpevents.txt

gplogview -o \\<server>\<share>\<computername>-gpevent.txt

gplogview -h -o \\<server>\<share>\<computername>-gpevent.html