We set up some Linux machines to use our company's LDAP server for authentication. We were then acquired by another company, and they want us to use their LDAP server and retire the old one. But the user names are not the same - the old names are now IDs. "asmith" might now be represented by "AS31328", and "asmith" doesn't appear anywhere in the record.
Is there a way I can configure the machine to allow the existing user names but map them to the correct user IDs in the new LDAP server? New users would have to use their ID instead of the old name, but existing users would still be able to use asmith/password and the mapping "asmith <-> AS31328" would point to the AS31328 user in LDAP.
Alternatively, can I rename the existing accounts so that going forward, you'd have to log in using AS31328 instead of asmith but your existing files and permissions would remain?