In Unix, the /etc/fstab file is used by system administrators to list the filesystems that are mounted automatically at startup by the mount –a command (in /etc/rc or its equivalent startup file). Answer: C is incorrect. In Unix, the /etc/mtab file contains a list of the currently mounted file systems. This is set up by the boot scripts and updated by the mount command. Answer: A is incorrect. In Unix, the /etc/named.conf file is used for domain name servers. Answer: B is incorrect. In Unix, the /etc/groups file contains passwords to let a user join a group.