Defaults syslog=auth
Defaults>root !set_logname
Defaults:millert, mikef, dowdy !lecture
Defaults:millert !authenticate
Defaults!/usr/bin/more, /usr/bin/pg, /usr/bin/less noexec

millert, mikef, dowdy ALL = NOPASSWD: ALL

ALL orion, perseus, hercules = NOPASSWD: /sbin/umount /CDROM, /sbin/mount -o\
    nosuid\,nodev /dev/cd0a /CDROM
