sudo: can't open /private/etc/sudoers: permission denied

I used an archived link here http://discussions.apple.com/thread.jspa?threadID=1349600

Last login: Sun Mar 20 17:55:05 on console
MacBook-Pro:~ admin$ ls-lad/ /private/private/ect
-bash: ls-lad/: No such file or directoryMacBook-Pro:~ admin$ sudo du
sudo: can't open /etc/sudoers: Permission deniedMacBook-Pro:~ admin$ ls-le /private/ect/sudoers
-bash: ls-le: command not found
MacBook-Pro:~ admin$ ls -le /private/ect/sudoers
ls: /private/ect/sudoers: No such file or directory
MacBook-Pro:~ admin$ sudo -s
sudo: can't open /etc/sudoers: Permission denied
MacBook-Pro:~ admin$ ls -l /usr/bin/sudo
-r-s--x--x 1 root wheel 272384 23 Jun 2009 /usr/bin/sudo
MacBook-Pro:~ admin$ sudo -v
sudo: can't open /etc/sudoers: Permission denied
MacBook-Pro:~ admin$ dsmemberutil checkmembership -u $(id -u) -g 80
user is a member of the group
MacBook-Pro:~ admin$ ls -lh@Oe /private/etc/pam.d
total 0
-r--r--r-- 1 root wheel - 200B 24 Jun 2009 chkpasswd
-r--r--r-- 1 root wheel - 203B 20 Jul 2009 cups
-rw-r--r-- 1 root wheel - 204B 18 May 2009 ftpd
-r--r--r-- 1 root wheel - 475B 24 Jun 2009 login
-r--r--r-- 1 root wheel - 434B 24 Jun 2009 login.term
-r--r--r-- 1 root wheel - 191B 18 Jul 2009 other
-r--r--r-- 1 root wheel - 197B 24 Jun 2009 passwd
-r--r--r-- 1 root wheel - 211B 25 Jun 2010 rshd
-rw-r--r-- 1 root wheel - 141B 22 May 2009 samba
-rw-r--r-- 1 root wheel - 366B 31 Jul 2009 screensaver
-r--r--r-- 1 root wheel - 499B 11 Jul 2009 sshd
-r--r--r-- 1 root wheel - 356B 18 May 2009 su
-r--r--r-- 1 root wheel - 203B 23 Jun 2009 sudo
MacBook-Pro:~ admin$ cat /private/etc/pam.d/sudo
# sudo: auth account password session
auth required pam_opendirectory.so
account required pam_permit.so
password required pam_deny.so
session required pam_permit.so

MacBook-Pro:~ admin$ ls -lad / /private /private/etc
drwx---r-x+ 31 Lee wheel 1122 20 Mar 17:51 /
drwxr-xr-x@ 6 root wheel 204 30 Dec 15:30 /private
drwxr-xr-x 88 root wheel 2992 20 Mar 17:50 /private/etc

tried Reboot into single user mode
/sbin/fsck -fy
/sbin/mount -wu /
/bin/chmod 1775 /
/bin/sync
exit

still no luck, can anyone advise?

Message was edited by: Dinger