>mkdir foo
>ls -ld foo
drwxr-xr-x 2 alex users 40 Jul  9 10:44 foo/
>mkdir foo/bar
>ls -l foo
total 0
drwxr-xr-x 2 alex users 40 Jul  9 10:44 bar/
>chmod 000 foo
>ls -ld foo
d--------- 3 alex users 60 Jul  9 10:44 foo/
>ls foo
/bin/ls: cannot open directory foo: Permission denied
>cd foo
-bash: cd: foo: Permission denied
>chmod 100 foo
>ls foo
/bin/ls: cannot open directory foo: Permission denied
>cd foo
>pwd
/tmp/foo
>ls
/bin/ls: cannot open directory .: Permission denied
>cd bar
>pwd
/tmp/foo/bar
>cd /tmp
>chmod 400 foo
>ls -ld foo
dr-------- 3 alex users 60 Jul  9 10:44 foo/
>cd foo
-bash: cd: foo: Permission denied
>cd foo/bar
-bash: cd: foo/bar: Permission denied
>