OpenNetGuru

1) cat etc/network/interfaces to view IP address

# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static # change here dhcp to static
address 172.16.183.XX  # ip address of the machine
netmask 255.255.255.0  # network mask
gateway 172.16.183.2   # Gateway of the machine

2) View the hostname  cat /etc/hosts

chandra@jump-server:~$ cat /etc/hosts
127.0.0.1       localhost
127.0.1.1       jump-server # change or verify the hostname

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters


3) verify the hostname: cat /etc/hostname

4) Verify DNS entry: cat /etc/resolv.conf

nameserver 165.21.100.88
nameserver x.x.x.x
nameserver x.x.x.x

5) service restart: sudo /etc/init.d/networking restart | stop | start

6) List ip info: sudo ifconfig

7) more info on networking: sudo lshw -C network

  *-network
       description: Ethernet interface
       product: 79c970 [PCnet32 LANCE]
       vendor: Advanced Micro Devices [AMD]
       physical id: 0
       bus info: pci@0000:02:00.0
       logical name: eth0
       version: 10
       serial: 00:0c:29:9d:b6:1c
       width: 32 bits
       clock: 33MHz
       capabilities: bus_master rom ethernet physical logical
       configuration: broadcast=yes driver=pcnet32 driverversion=1.35 ip=172.16.183.172 latency=64 link=yes maxlatency=255 mingnt=6 multicast=yes
       resources: irq:18 ioport:2000(size=128) memory:dc100000-dc10ffff(prefetchable)

8) sudo ifup eth0 - bring a network interface up

   sudo ifdown eth0 - take a network interface down