restoring passwd/group files
I copied the /etc/shadow, /etc/passwd and /etc/group files from another system onto my Fedora box, and now the system locks up at random. Is there a way to restore the files to the default ones, without having the originals? Is there a way to examine /etc/passwd and /etc/group for errors, to see if they are really causing the lockups?
What are /etc/passwd- and /etc/group-?
Thanks in advance