MULTIPLE NAMESERVERS CONFIGURED:
# The primary network interface
auto ens160
iface ens160 inet static
address 10.5.16.38
netmask 255.255.255.192
gateway 10.5.16.1
mtu 1430
dns-nameservers 127.0.0.1 10.5.0.10 10.5.0.11
resolv.conf shows:
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 127.0.0.1
MULTIPLE NAMESERVERS CONFIGURED WITHOUT LOCALHOST:
# The primary network interface
auto ens160
iface ens160 inet static
address 10.5.16.38
netmask 255.255.255.192
gateway 10.5.16.1
mtu 1430
dns-nameservers 10.21.0.138 10.21.0.139
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 10.21.0.138
nameserver 10.21.0.139