When I login to server in Text mode the following Message appearing on one of Server
CIFS VFS: Unexpected SMB signature
We are using Redhat 5.6 64 bit.
Is this serious error and how to resolve this.
This would lead me to believe that you have either an
mount -t cifs command somewhere in you login configuration files. I'd look around in your .bashrc & .bash_profile files to start.
If you don't want to take the time to research the root cause you'd be OK in ignoring this message. It's basically saying that a SMB (Samba) mounting was attempted and failed.
A SMB mounting is when a Linux system mounts a directory/share from either a Windows system that's sharing one, or a Linux system running Samba, and is sharing out directories.