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How to change ip address on Linux server

Hi Experts,

I have a linux server with a static ip address of 10.10.2.36. I would like to change to a different address. I'm at the following prompt, please note I have no experience with Linux, I just want to change the ip address.

[root@nglinux04]#

mrcannon

Each distro has it's own GUI methods however...

this command will set ip address of ethernet adapter eth0 to 192.168.1.5
# ifconfig eth0 192.168.1.5 netmask 255.255.255.0 up
# ifconfig eth0

To make permanent changes to IP address you need to edit configuration file according to your Linux distribution.

frankbustos

ASKER

ok, this is my windows ipconfig/all
IP Address. . . . . . . . . . . . : 192.168.89.155
Subnet Mask . . . . . . . . . . . : 255.255.254.0
Default Gateway . . . . . . . . . : 192.168.88.1
DHCP Server . . . . . . . . . . . : 192.168.88.12
DNS Servers . . . . . . . . . . . : 192.168.88.2
172.21.0.12
172.21.1.10
Primary WINS Server . . . . . . . : 10.2.102.4
Secondary WINS Server . . . . . . : 10.2.102.5

I typed in this command #root: vi /etc/sysconfig/network-scripts/ifcfg-eth0 and I'm now editing but need to know the broadcast address and network address?

aleghart

Network address is x.x.x.0
Broadcast address is x.x.x.255

All the numbers from x.x.x.1 - 254 are for your use on the LAN.

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furetto

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expert1010

The prefered method is not ifconfig now days. It's "ip".

ip addr change 192.168.89.155/23 dev eth0

check with "ip addr" to see that it is correct.

For permanent changes you should do as suggested in /etc/.....

To get the broadcast address and such install sipcalc and do this.

sipcalc 192.168.89.155 255.255.254.0
or
sipcalc 192.168.89.155/23

You'll get this
-[ipv4 : 192.168.89.155/23] - 0

[CIDR]
Host address - 192.168.89.155
Host address (decimal) - 3232258459
Host address (hex) - C0A8599B
Network address - 192.168.88.0
Network mask - 255.255.254.0
Network mask (bits) - 23
Network mask (hex) - FFFFFE00
Broadcast address - 192.168.89.255
Cisco wildcard - 0.0.1.255
Addresses in network - 512
Network range - 192.168.88.0 - 192.168.89.255
Usable range - 192.168.88.1 - 192.168.89.254

If you're on a debian-based thing do this:
apt-get install sipcalc

suse:
zypper in sipcalc

on red had/centos/fedora you already have ipcalc
do this and you'll get almost the same result
ipcalc 192.168.0.1/23

Julian Parker

you dont have to enter the broadcast and network addresses, the system can work them out for you.

frankbustos

ASKER

thanks for your expert help!