Changing a DB2 server name

If you find DB2 not being able to start because of a server name problem, it most likely is caused by moving a virtual machine and not renaming the DB2 database.

To update DB2 to the proper name:

1. Stop DB2 as administrator (db2inst user).
   >su – db2inst
   >db2stop
   If there are open database connections, then force them off.
   >db2stop force
2. Go to the sqllib directory.
3. Edit the db2nodes.cfg file. The file is usually read-only, so make enable writing first.
   >chmod u+w db2nodes.cfg
   >vi db2nodes.cfg
4. In the db2nodes.cfg file, rename the existing computer name to that of the new computer name.
5. Save the file.
6. Reset the permissions to read-only.
   >chmod u-w db2nodes.cfg
7. Start DB2.
   >db2start

You should no longer see any error messages about finding the database.