Changing the hostname,ip

[Manuel Carbajal]

Hi,

i have two machines that i would like to swap their hostnames and ip, what consideration do i have to know, which is the best way to do this?

Thanks in advance,

Regards,

[Paul R. Dittrich]

Do a "man hostname" and a "man ifconfig" for the command line details.
Either pick a 3rd (unused) hostname and ip to "park" the first system while you change the second, or take them off the network until you are done with the swap.

HTH,
Paul

[Balaji N]

hi,
shutdown or pull one machine out of the network. if that is not possible, use a temporary host name and ip for it.

change host / ip for the other machine.

change host / ip for the first machine.

dont forget to update the host files and dns server for these entries if u have any. also, be aware of this change and as these might reflect in the logs as well. do u run any specific applications, firewall, etc. take care of them.

hth
-balaji

[Steven E. Protter]

Machine 1

ifconfig eth0 (replace zero with actual value) down

Machine 2

ifconfig eth0 (replace zero with actual value) down


make permanent changes to /etc/sysconfig/network-scripts files

Then either reboot or

Machine 1
ifconfig eth0 ip_address network_mask

Machine 2
ifconfig eth0 ip_address network_mask

SEP

[Michael Steele_2]

Why don't you just use NETCONF? Just choose manual configuration. Read the description below:


You can enter network configuration parameters in this window:
This machine's IP - enter IP number for this computer here
Network mask - enter netmask here. If omitted, mask will be calculated based on IP (which will not necessarily be right).
Broadcast address - enter network broadcast address here. If omitted broadcast address will be calculated based on IP (not mask! - which will not necessarily be right).
Default gateway - enter IP address of default network gateway (router) here.
Nameserver IP(s) - enter one or more (separated by spaces) name servers' IP addresses here. Can be omitted, but then domain names couldn't be used.
Default domain(s) - you can enter one or more (separated by spaces) domain names to search host if incomplete domain names will be used. It's optional.

http://dmacherowski.strony.wi.ps.pl/Pocket/manual.html.en.htm

[CCIL]

Hi there is command "set_parms" it provides various option like changing the IP address , hstname , date_time, root_passwd, etc. whne you are changing the IP address of the one machine make sure the other machine is out of network.

[Steven E. Protter]

Wait a minute. Isn't set_parms an HP-Ux only utility.

To Author: These guys posted great answers. Why don't you give them a point or two?

SEP