Updating NetBackup Client on Server

Have a look at the Client type in the policy. That is the version that the master will look for under /usr/openv/netbackup/client/Linux/<OS version>.

You can also list Client versions with: 
bpplclients -allunique

To find a specific client, do:
bpplclients -allunique | grep <client-name>

If  Linux, RedHat2.6 is listed, you should be able to update the policy by re-selecting Client type as Linux, RedHat2.6.18.

The cat version shows NetBackup-RedHat2.6.18 7.5

You will have to re-install the 7.5.0.7 Client patch with a 'force-install' option (-p).
Run '/bin/sh NB_update.install -p' 

So, to summarize: 

1. Update Client type in policy
2. Re-install 7.5.0.7 Client patch (with -p option)
3. Verify patch version in /usr/openv/netbackup/client/Linux/<OS version>.
4. Push updated client patch to client(s).