Send request to network host to trigger response (limit count via -c)
ping <domain>
ping -c <count> <host>
Show internet route to host
traceroute <host>
Network protocol status (limit to specific protocol -p eg. tcp, udp)
netstat
netstat -p <protocol>
Show registration details for domain
whois <domain>
Show basic (and expanded using any) DNS records for domain (Note: any may be disabled by the DNS provider)
dig <domain>
dig <domain> any
Show specific DNS records for domain (eg. A, MX, NS)
dig <record-type> <domain>
Alternative DNS lookup utility to dig
host -a <domain>
nslookup -q=<record-type> <domain>
Show authoritative name servers for domain (+short for minimal output)
dig NS <domain>
dig +short NS <domain>
Alternative name server lookup utility to dig
host -t NS <domain>
nslookup -q=NS <domain>
Clear stale DNS cache in chrome (Open Chrome DNS settings -> Clear host cache)
chrome://net-internals/#dns
Chrome Net Internals can also show the DNS entries for specific domains