I recently had to reconfigure my linux (Ubuntu 10.04 LTS) servers.I had previously used these two howto’s to configure my servers.Suddenly one of them refused to properly connect with various error messages: # wbinfo -pPing to winbindd failed # wbinfo -uError looking up domain users # wbinfo -tchecking the trust secret via RPC calls failedCould not check secret After a week of googling I finally found the following solution, which did the trick for me. Stop smbd, nmbd and winbindd (make sure they are really dead using ps. winbindd still lingered after I stopped the service) Delete the linux computer from the Primary Domain Controller (using the Management Console) Delete the secrets database (/var/lib/samba/secrets.tdb) Join the domain again Start the daemons (smbd, nmbd and winbindd) […] Read more