How do I change the IP address from DHCP to my static IP (reserved for this server)?
What are the exact commands to get into the configurattion interface?
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You have two options. However, since you need to change the IP address to static, the only way is to set-up a manual/static IP editing the
/etc/network/interfaces file. for that you need to edit the interfaces file with;
sudo nano /etc/network/intarfaces
You'll ideally see something like;
auto eth0 iface eth0 inet dhcp
Replace it with;
auto eth0 iface eth0 inet static address x.x.x.x netmask x.x.x.x gateway x.x.x.x
Moving further, if you have or require domain to be resolved along with DNS servers, you may add few more lines to the file, similar to;
auto eth0 iface eth0 inet static address x.x.x.x netmask x.x.x.x gateway x.x.x.x dns-search example.com dns-nameservers x.x.x.x x.x.x.x
Please note, there are two sets of
x.x.x.x within the DNS name servers (Primary and Secondary) with a space. You may use one pair or both depending on your requirement.
To save the file select ctrl+o, -> enter and exit with ctrl+x.
And then just to be sure, simple restart the interface with;
sudo ifdown eth0 # wait for sometime sudo ifup eth0 # and then issue this to restart
Also, as a final step, simply type below to confirm the interface change;
Refer to your server or the device which responds to DHCP requests and add a reservation, in case if you do not like to play with the server, files.. etc.
In order to get the MAC address for reservation, simply check the interface information with a;
ifconfig eth0 # or type ifconfig -a
which should ideally display something similar to below;
ifconfig eth0 eth0 Link encap:Ethernet HWaddr 00:15:c5:4a:16:5a inet addr:10.0.0.100 Bcast:10.0.0.255 Mask:255.255.255.0 inet6 addr: fe80::215:c5ff:fe4a:165a/64 Scope:Link UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 RX packets:466475604 errors:0 dropped:0 overruns:0 frame:0 TX packets:403172654 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:2574778386 (2.5 GB) TX bytes:1618367329 (1.6 GB) Interrupt:16
Where you see the
HWaddr 00:15:c5:4a:16:5a and assign it to the DHCP reservation.
Hope this helps!