I have four RHEL6.4 vmware servers that perform specific backup duties and nothing else.
Users need to log in to the server remotely via SSH as the servers are located on physical hardware in a geographically diverse area.
I can log in remotely using the root account with no issue. When I try and log in using a normal user account (to then sudo to root) I cannot get access. I get an 'incorrect password' prompt. Even if I then log back in as root and change the specific username password, it still doesn't work when I try the user account again.
I have researched the problem across the Internet but many of the sites that may have the answer are blocked by company policy.
These accounts used to work with no problem, so something has changed but I need a few pointers please folks.