DNS Lookup

Installing dnsutils

sudo apt-get install dnsutils

dnsutils Tools

When installing dnsutils, you will be able to use the following commands

• dig
• nslookup
• nsupdate

Command syntax

dig

dig [server] [name] [type]
dig [@server] [-b address] [-c class] [-f filename] [-k filename] [-m] [-p port#] [-t type] [-x addr] [-y name:key] [-4] [-6] [name] [type] [class] [queryopt...]

dig example.com
dig example.com MX
dig example.com SOA
dig example.com TTL
dig example.com ANY +noall +answer

#reverse lookup
dig -x 1.1.1.1 +short

nslookup

nslookup [-option] [name | -] [server]

nslookup example.com
nslookup -query=mx example.com
nslookup -type=soa example.com
nslookup -type=any example.com
nslookup -timeout=10 example.com
nslookup -port 56 example.com
nslookup -debug example.com

nsupdate

nsupdate [-d] [[-y keyname:secret] | [-k keyfile]] [-t timeout] [-u udptimeout] [-r udpretries] [-v] [filename]