How To Change Ip Address Static Dynamic Linux Fedora Core Red Hat

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This Page Contains information about How To Change Ip Address Static Dynamic Linux Fedora Core Red Hat By wallpaperama in category Linux Systems with 20 Replies. Last Upated: Thu May 15, 2014
today, i just installed a new OS on a computer. i installed fedora 7 and now because i had to take a trip, i can only ssh into my server and i have to change my ip adress, Originally when i installed the os, i set it to DHCP, but now i want to change it to a static ip. so if you are in the same situation as i am, maybe you can learn from this on how you can change your ip address remotely..

these are the steps i took to make it happen

1. login as root

2. get your current IP address with this command:
ifconfig

The OUTPUT will look someting like this:
[root@host ~]# ifconfig
eth0 Link encap:Ethernet HWaddr 00:D0:BC:08:09:BC
inet addr:70.238.17.69 Bcast:255.255.255.255 Mask:255.255.255.248
inet6 addr: fe80::2d0:b7ff:fe08:9bb/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:7174 errors:0 dropped:0 overruns:0 frame:0
TX packets:2305 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:5339910 (5.0 MiB) TX bytes:170109 (166.1 KiB)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:34 errors:0 dropped:0 overruns:0 frame:0
TX packets:34 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:4275 (4.1 KiB) TX bytes:4275 (4.1 KiB)


OR you can also get the ip from the network configuration file wit this command:
COMMAND to show configuration:
cat /etc/sysconfig/network-scripts/ifcfg-eth0


THe OUTPUT will look like this (i have it set to DHCP)
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:D0:B7:08:09:BB
ONBOOT=yes


OUTPUT for static IP (example)
#
# File: ifcfg-eth0
#
DEVICE=eth0
IPADDR=192.168.1.100
NETMASK=255.255.255.0
BOOTPROTO=static
ONBOOT=yes
#
# The following settings are optional
#
BROADCAST=192.168.1.255
NETWORK=192.168.1.0


3. Ok, on step 3 we are going to change from DHCP to static ip. so send this command to edit the /etc/sysconfig/network-scripts/ifcfg-eth0 file: (im using nano, but you can use vi if you want)
nano /etc/sysconfig/network-scripts/ifcfg-eth0


Change from this:
# Intel Corporation 82557/8/9 [Ethernet Pro 100]
DEVICE=eth0
BOOTPROTO=dhcp
HWADDR=00:D0:B7:08:09:BB
ONBOOT=yes


TO this:
# File: ifcfg-eth0
#
DEVICE=eth0
IPADDR=192.168.1.100
NETMASK=255.255.255.248
BOOTPROTO=static
ONBOOT=yes


4. now save your changes and reboot your server.
apco
you know what, i followed your steps, but they didn't work. i think its just easier if you doit through the setup command
http://wallpaperama.com/forums/how-to-change-ip-address-static-dynamic-linux-fedora-core-red-hat-t1692.html
wallpaperama
cool, can you show you me how to do that!
apco
yeah, this is how you do it.

first send this command:
setup


and you will see something like this picture. using your arrows, select Network Configuration and hit the ENTER key on your keyboard

linux setup
apco
next, you will see a select device. if you have only one nic on your computer, you will only see one, but if you have more than one nic, you will see more. so now select the interface you want to change the ip for, you select the device with your arrows until the device you want is highlighted in red, then hit ENTER on your keyboard.
apco

now populate the fields according to your new ip address and save.
then reboot your server with this command:

reboot
wallpaperama
thanks, that was much easier.
spen
this is very helpful!
i would like to comment that you can restart the network service instead of rebooting..

on fedora.. /etc/init.d/network restart

:)
interface
yeah, its better to just restart the network instead of rebooting the machine. thanks for your tutorial. helped me alot
Nate
i tried both methods listed here, but when i restart my computer, or restart the network service, i get my old dhcp-assigned ip address.

initially, my /etc/sysconfig/network-scripts/ifcf file did not have the bootproto directive. i added that, and set it to static. my entire /etc/sysconfig/network-scripts/ifcf file now looks like this:

peerdns=yes
hwaddr=
Howard
instead of rebooting you can just run:

/etc/init.d/network restart
Rajesh
thanq frnd.. this helped me a lot..
Chetan
i think the only thing which is missing from modifying the /etc/ifcfg-eth0 file above is mentioning the gateway.

put this line along with what already in there and restart the networking servinces and you should be good to go:

# gateway is your routers ip address generally.
gateway=192.168.0.1
Danniel
thank you so much for the sharing!
Khattak
Thanks alot! i wanted to ask you that if i want to manipulate/change the IP in a Packet then how can i do it with C in fedora11. can you guide me. i am making a code for it. waiting for your reply.....
Nethaji
Hi, Thanks for sharing your thoughts. I am new to LINUX, i got some info from you friends.
Lewis
Im trying to setup my network settings for 2 class rooms. maybe you could help me out. T114 and T115 lab classes have identical hardware configuration but different network addresses. Write a script that sets up/changes your network settings based on the lab class you are in. It can be a menu-driven utility or a fully automated script called by rc.local.
Vinodh
I can't change to manual IP address even followed your instruction. After restart system, following settings are configured automatically. Any idea....? eth0 Link encap:Ethernet HWaddr 00:11:D8:4C:FE:F6 inet addr:169.254.22.18 Bcast:169.254.255.255 Mask:255.255.0.0 inet6 addr: fe80::211:d8ff:fe4c:fef6/ Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:1196 errors:0 dropped:0 overruns:0 frame:0 TX packets:107 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:117164 (114.4 KiB) TX bytes:16839 (16.4 KiB) Interrupt:20 Base address:0xc000
Ben
Reboot? That looks like Windows user!! You only need restart the network service /etc/init.d/netwo restart
nep
I do it static for u r commands but i finished and restart the system my internet connection is not worked properly. what can i do for solve this problem and what type of error this.
Title: How To Change Ip Address Static Dynamic Linux Fedora Core Red Hat [2964]
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