In my /etc/nsswitch.conf have I set
hosts: files nis dns
With
ypwhich
ypcat hosts
ypcat passwd
can I verify that passwd and group are retrieved over NIS.
Question
How do I verify that DNS is working in NIS, as ping gets it DNS from /etc/resolve.conf and not NIS?
Normally ping and other commands to need host name resolving are linked to libc and should follow the order you demanded in /etc/nsswitch.conf and use /etc/hosts and NIS before resolving to dns.
nslookup and dig always consult DNS and never use the entries in /etc/hosts or NIS.
getent hosts <hostname | ip-address> will use the C resolver functions, honours nsswitch.conf and will show entries from your hosts file or the NIS directory before trying dns to lookup that hostname or ip-address
