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Chanage IP address of a server

Hi,

Please lists the necessary steps in order to change the IP address of a server. e.g. the files need to be edited, modify routing information?

Thanks!

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cplau
Asked:
cplau
2 Solutions
 
sunnycoderCommented:
Hi cplau,

which unix ?

Sunnycoder
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yuzhCommented:
For Solaris:

you can use  /usr/sbin/sys-unconfig , command to undo your systems configuration, and then reboot your system.

    When system boot up, just following the screen to fill in all the new information about you system configuration.

    or you manually edit the following files: (use text editor, eg vi)
     /etc/nodename    #if you need to change the name of the machine
    /etc/hostname.interface    (eg hostname.hme0 )
    /etc/hosts                        # Update to reflect new IP
    /etc/nsswitch.conf           # Update if your name resolution
    /etc/resolv.conf       #Update if your name servers/domain changed (DNS only)
    /etc/defaultdomain   # set you default domain
   /etc/defaultrouter      # Set the default router's IP

   /etc/inet/networks             # Set your network name
   /etc/inet/netmasks             # Set your network number
   /etc/net/ticots/hosts           # For the streams-level loopback
   /etc/net/ticlts/hosts            # For the streams-level loopback
   /etc/net/ticotsord/hosts      # For the streams-level loopback

   If you have no experience about theses files, please make a backup before making the change. after you edit all the file, reboot your system.

For HP-UX:
   /sbin/set_parms ip_address

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yuzhCommented:
For SCO:

use scoadmin

other Unix favour:

Assume that your current IP is 192.168.1.1
find /etc -type f -print |xargs grep -l "192\.168\.1\.1" > /tmp/list

edit the file in /tmp/list
eg
vi `cat /tmp/list`

save the change, and reboot.

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cplauAuthor Commented:
Hi All,

I am using Digital Unix V4.0. Thanks for your advise.

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tfewsterCommented:
Run `/usr/sbin/sysman net_wizard` - It will walk you through all the steps to set IP address, routes, netmask etc.

For Tru64 V4.0, you may have to use `netsetup` instead - Check the man page


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yuzhCommented:
The "find" + "vi" in comment (http:#11961555) still can do the job.

To make it simply, just edit the following files and reboot:

/etc/rc.config    # specifies the hostname, IP number, and netmask.
/etc/routes        #specifies the default route:
/etc/resolv.conf  #specifies the DNS servers.
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tfewsterCommented:
On a Tru64 system, you may find /etc/rc.config is a link to  ../cluster/members/{memb}/etc/rc.config , so the find command would need to be:

find /etc -follow -print |xargs grep -l "192\.168\.1\.1" > /tmp/list


However, yuzh has listed the important files anyway ;-)
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gheistCommented:
Do this at your hosts console, since changing IP address may leave running net servicesin inconsistent state.
DNS name chenges may be required in external nameservers too
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mehta_rohitCommented:
hi
Do following steps to chage ur server ip
type following and use ur ip and subnet mask

"ifconfig lan0 172.27.1.1 netmask 255.255.255.192"


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