Basic - Network Utilities

ping




host 

The host command in linux is used to resolve a host name into an Internet Protocol (IP) address or an IP address into a host name. It is being treated as a DNS Lookup utility.

- To find the IP address of a Hostname.

[root@unixlinux ~]# host google.com
google.com has address 74.125.68.138
google.com has address 74.125.68.139
google.com has address 74.125.68.100
google.com has address 74.125.68.101
google.com has address 74.125.68.102
google.com has address 74.125.68.113

- To find the hostname of an IP address.

[root@unixlinux ~]# host 10.132.88.33
33.88.132.10.in-addr.arpa domain name pointer ip-10-132-88-33.ap-southeast-1.compute.internal.

-To query of type ANY record for the domain.

[root@unixlinux ~]# host -a google.com
Trying "google.com"
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 13858
;; flags: qr rd ra; QUERY: 1, ANSWER: 19, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;google.com.                    IN      ANY

;; ANSWER SECTION:
google.com.             88403   IN      NS      ns4.google.com.
google.com.             88403   IN      NS      ns1.google.com.
google.com.             88403   IN      NS      ns2.google.com.
google.com.             88403   IN      NS      ns3.google.com.
google.com.             120     IN      A       74.125.130.138
google.com.             120     IN      A       74.125.130.139
google.com.             120     IN      A       74.125.130.100
google.com.             120     IN      A       74.125.130.101
google.com.             120     IN      A       74.125.130.102
google.com.             120     IN      A       74.125.130.113
google.com.             300     IN      AAAA    2404:6800:4003:c01::8b
google.com.             600     IN      MX      20 alt1.aspmx.l.google.com.
google.com.             600     IN      MX      30 alt2.aspmx.l.google.com.
google.com.             600     IN      MX      40 alt3.aspmx.l.google.com.
google.com.             600     IN      MX      50 alt4.aspmx.l.google.com.
google.com.             600     IN      MX      10 aspmx.l.google.com.
google.com.             86400   IN      TYPE257 \# 19 0005697373756573796D616E7465632E636F6D
google.com.             86400   IN      SOA     ns1.google.com. dns-admin.google.com. 2014021800 7200 1800 1209600 300
google.com.             3600    IN      TXT     "v=spf1 include:_spf.google.com ip4:216.73.93.70/31 ip4:216.73.93.72/31 ~all"

Received 497 bytes from 10.132.88.2#53 in 5 ms

hostname

ifconfig

 inetd
ip


nslookup

netcat

 netstat

dig

telnet

ssh

scp

ftp
rdate
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route
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elinks

wget