1- Wonder, is this a good setup of permissions in the /var directory?

drwxr-xr-x  2 root root  4096 2010-05-30 03:34 backups
drwxr-xr-x  7 root root  4096 2010-05-29 17:55 cache
drwxr-xr-x 29 root root  4096 2010-05-29 17:55 lib
drwxrwsr-x  2 root staff 4096 2009-07-14 04:36 local
drwxrwxrwt  3 root root    60 2010-06-02 03:34 lock
drwxr-xr-x  9 root root  4096 2010-06-02 03:34 log
drwxrwsr-x  2 root man   4096 2009-09-20 20:36 mail
drwxr-xr-x  2 root root  4096 2009-09-20 20:36 opt
drwxrwxrwt 12 root root   420 2010-06-02 12:12 run
drwxr-xr-x  4 root root  4096 2009-09-20 20:37 spool
drwxrwxrwt  2 root root  4096 2009-07-14 04:36 tmp
drwxr-xr-x 14 user root  4096 2010-05-30 22:21 www

2- Could you give me a brief explanation of the columns above? First one is which permissions they have. Second is a nr. Third and fourth says "root root" for example. fifth is another nr (4096 for example). and the others are obvious.

3- Could you give me a brief explanation of the folders above? Especially the "lock" and "tmp" folders. Lock contains an apache2 folder which seems empty.

Thanks