How to change a system name or IP address on SCO Unix.
Some material is very old and may be incorrect today
© September 2000 Jeff Liebermann
November 1999 Many people land here from Google searches for how to change an ip address on SCO Unix. Jeff's article is more about other things you MIGHT have to change AFTER you change the ip address (although written for OSR5, Jeff's advice can be helpful on any Unix On all OSR5 and Open Desktop systems, "netconfig" (graphical or in character mode) lets you change the ip address. You will need to IT IS NOT ENOUGH TO JUST CHANGE /etc/hosts !!! You need to use netconfig.
Changing /etc/tcp will just cause you more grief - don't do it!
You also will probably need to edit the OLD address out of /etc/hosts after doing this. See Why do I get "portmapper is not responding" errors?
A related task is changing the default route. See How do I add a default route?
By the way, the trick to using netconfig or any of the SCO admin ("scoadmin") tools in character mode is to understand that the TAB key moves between panes - so to move from a sub-pane back to the menus, hit TAB and vice-versa.
Finally, this thread on ipf/ipnat might matter.
Changing a name or IP address takes more than just running netconfig. There are far too many files that have system names, IP addresses, or both inside. I recently finished renaming a server. It took me 2 hours to get it straight and test the results.
The following is a list of files involved in renaming a server. I may have missed some as I was not running DNS or sendmail on this particular machine. Each file should be inspected for residue of the old name or IP address.
/etc/tcp (symlinked to 2 other files) /etc/hosts /etc/networks /etc/gateways /etc/resolv.conf /etc/lmhosts (lan man only) /etc/systemid /etc/ppphosts (ppp only) /etc/pppauth (ppp only) /etc/default/tcp /etc/default/nbconf (netbios configuration) /etc/hosts.equiv (network security) /etc/hosts.lpd (rlp security) /etc/rc2.d/S91route (setup default route) /.rhosts /etc/conf/cf.d/config.h (created by idconfig relink) /etc/conf/cf.d/stune (changed by uname -S new_name) /usr/lib/uucp/Permissions (MYNAME=xyzxx) /usr/lib/uucp/Configuration (MYNAME=xyzxx) /usr/mmdf/mmdftailor /usr/mmdf/table/* (numerous files)
You should also run:
uname -S new_name /usr/mmdf/table/dbmbuild
Be sure to rebuilt the kernel with:
cd /etc/conf/cf.d ./link_unix
To change the IP address, the following files are also affected.
/etc/tcp /etc/hosts /etc/gateways /etc/networks /etc/ppphosts /etc/ppppool /usr/mmdf/table/smtp.chn /etc/bootptab
If you are running sendmail instead of MMDF, the pathalias databases and sendmail.cf should be edited.
If you are running DNS, you will need to edit:
/etc/named.bootand all the underlying databases.
If you have any networked printers, check:
If you use RARP to configure printers, check:
If you are running INN news, you will need to edit:
/usr/lib/news/*to change both the system name and various IP addresses used for NNTP.
If you are running an Apache web server, be sure to edit the system name(s) in:
/usr/local/etc/httpd/conf/access.conf /usr/local/etc/httpd/conf/httpd.conf /usr/local/etc/httpd/conf/srm.conf
If you have Vision FS, AFPS or Samba running, the peripherals on the server are known to MSDOS machines as:
\\server_name\device_nameChanging the server name will necessitate changing all the printer and filesystem shares.
If you have imbedded the "default server" or its IP address in any managed hubs, routers, print servers, bridges, or SNMP managed devices, these will need to be tweaked.
As you can see, renaming and reconfiguring the IP addresses of a server is not a trivial task. The chain of aliases are long and convoluted. Keep backup copies of all key files and a notepad with all the files that were tweaked.© Jeff Liebermann ([email protected]) All rights reserved
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