Assigning different directory permission for each different groups

Question

I am running Ubuntu 12.04 64bit server on ext4.

There are four user groups - marketing, sales, admin and etc.

I need to assign different permissions to /archive as follows:

rw for the marketing group
r for the sales group
rwx for the admin group
w for the etc user group

How exactly can I achieve this?

Answer 1

Open terminal Ctrl+Alt+T and run following command :

Use Access Lists :

sudo apt-get install acl

1) Add the option acl to the partition(s) on which you want to enable ACL in /etc/fstab. For example:

 ...  
 UUID=07aebd28-24e3-cf19-e37d-1af9a23a45d4    /home    ext4   defaults,acl   0   2  
 ...

2) If necessary, remount partition(s) on which ACLs were enabled for them to take effect. For example:

sudo mount -o remount /home 

3) Verify that ACLs are enabled on the partition(s):

mount | grep acl

4) Add a group to acl

The utility setfacl is used to add the groups blue and green to the ACL for the directory /var/www.

sudo setfacl -m g:green:rwx /var/www/  
sudo setfacl -m g:blue:rwx /var/www/  
sudo getfacl /var/www/  
getfacl: Removing leading '/' from absolute path names  
file: var/www/  
owner: root  
group: root  
user::rwx  
group::r-x  
group:green:rwx  
group:blue:rwx  
mask::rwx  
other::r-x