Folder / File permission on Ubuntu Linux problem

Hi,

I created a website and put all html files on one folder e.g. /var/www, everything is fine on initial stage because I always use sudo <command>

Then,  there are two admin users user1 and user2, I grant the folder permission for the /var/www as below command:

sudo chown -R root:admin /var/www
sudo chmod -R 664 /var/www

So the problem is, when I use as "user1" ID upload files to that folder, user2 cannot modify my created files or folders, i check that the file permission status as below

under /var/www/
drwxr-xr-x   user1  user1      4096 2012-03-22 16:27 stylesheets/
-rw-r--r--      user1  user1       787 2012-03-23 11:12 index.html

So how can two admin users modify all the files in that folder?
liyyAsked:
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farzanjConnect With a Mentor Commented:
For recursively implementing permissions you can use -R.

setfacl -R -m ...

Also understand that giving a group permission is not same a giving user permission.  As I said before, some of the functions can only be done by user permission not group permission like chmod.
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Sikhumbuzo NtsadaSenior IT TechnicianCommented:
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1ly4meCommented:
try
#chgrp -R admin /var/www
(both user1 and user2 must be group members of Admin)
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farzanjCommented:
So do you want them to be able to modify file/permissions or are just wondering as to what happened and how they managed to change file/permissions?

If you want to them to be able to change, you can allow permissions through ACLs which provide customized granularity.

If you are wondering how they changed, there may be multiple ways.  What is the directory just above where they made changes?  So supposed they changed a file X in
/var/www/A/B/X, I want to see permissions of B.  Also, do they have sudo access?

If those files are directly under www, then issue command
getfacl /var/www
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liyyAuthor Commented:
user1 and 2 have already admin. group, and /var/www already be set.

I want to allow user1 and user2 can update all files including sub folders and files under /var/www

user1 and user2 will not use sudo because they will use Filezilla to upload the files, they cannot login as root on Filezilla
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torakeshbCommented:
Make the UID of user1 and user2 same by editing the /etc/passwd file.
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farzanjCommented:
If user1 and user2 are already in group admin, they should be able to do a lot of things with files.  They can do a lot of things to the files/folders owned by the group admin.  But the group permissions of the parent folder should be 7. What they cannot do is running chmod or chgrp kind of commands.  These commands require to be either the owner or root.

Another way is to use ACL.  So you can allow like

setfacl -m u:user1:rwx /path/folder/or/file
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liyyAuthor Commented:
OK, let me try it and feedback here.
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liyyAuthor Commented:
I use "sudo setfacl -m g:admin:rwx /path/folder" is OK, but existing sub-folders will also be executed setfacl again!
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