If you did not run that command at install, how can you run it in the future?
In my case, I have CSPC installed a VM - pretty sure I used the OVA. Apparently didn't run that command during install, or forgot the passwords, so am unable to SSH into the server. The VM console does not auto drop you into admin tool using the password.
I followed your advice about using boot disk. I used the CentOS 6 LiveDVD. Then I was able to mount the local disk following these instructions:
Once chrooted into local disk, I could edit the passwords using 'passwd', enable login by adjusting /etc/passwd, and adding the account collectorlogin to sudoers (just in case).
It is necessary now to run pwdreset?