How can i give permissions to a folder?

epamuk · 12-28-2009, 11:53 AM

Hi,

I want to give full permission to only two user. This two user must be have write, delete, read permission But Only this two user must be have this permissions.

How can i give this permissions? How to must i do settings with which commands? How to must be group and user settings of this folder?

Thanks.

acid_kewpie · 12-28-2009, 11:54 AM

for two users, you'd want to put them in an additional group together and make the directory be owned by that group, with appropriate permissions.

epamuk · 12-28-2009, 11:58 AM

Quote:

Originally Posted by acid_kewpie

for two users, you'd want to put them in an additional group together and make the directory be owned by that group, with appropriate permissions.

Thank you for quickly answer. But I want to know, How can i do this two user of same group memeber?

And How to must i do owned permissions of this folder as this group?

acid_kewpie · 12-28-2009, 12:11 PM

Unless you're using ACL extensions on ext3 or something then the only way to do this is to create a new group, add those two users to the group and change the ownership of the directory to the new group you created.

groupadd somegroup
usermod dave -a -G somegroup
usermod fred -a -G somegroup
chgrp somegroup /that/folder/where/ever/it/is
chmod g+rwx /that/folder/where/ever/it/is

epamuk · 12-28-2009, 12:51 PM

Quote:

Originally Posted by acid_kewpie

Unless you're using ACL extensions on ext3 or something then the only way to do this is to create a new group, add those two users to the group and change the ownership of the directory to the new group you created.

groupadd somegroup
usermod dave -a -G somegroup
usermod fred -a -G somegroup
chgrp somegroup /that/folder/where/ever/it/is
chmod g+rwx /that/folder/where/ever/it/is

Hi Cris,

I am getting this error messages when I run the this commands. Why i am getting this "usermod: user somegroup does not exist" message?

Quote:

[root@34istlinuxtest ~]# groupadd somegroup
[root@34istlinuxtest ~]# adduser dave
[root@34istlinuxtest ~]# usermod dave -a -G somegroup
usermod: user somegroup does not exist
[root@34istlinuxtest ~]# adduser fred
[root@34istlinuxtest ~]# usermod fred -a -G somegroup
usermod: user somegroup does not exist

acid_kewpie · 12-28-2009, 02:15 PM

I wrote the command in the wrong order apparently. Read the usermod manpage for correct syntax.

Valery Reznic · 12-30-2009, 01:37 PM

Quote:

Originally Posted by acid_kewpie

Unless you're using ACL extensions on ext3 or something then the only way to do this is to create a new group, add those two users to the group and change the ownership of the directory to the new group you created.

groupadd somegroup
usermod dave -a -G somegroup
usermod fred -a -G somegroup
chgrp somegroup /that/folder/where/ever/it/is
chmod g+rwx /that/folder/where/ever/it/is

I don't think it's enough.
While definitely only dave and fred will be able read/write files in this folder they likely will not be able change files created by another user
(unless files created with permissions 0666.

I suggest

Code:

chmod 2070 /that/folder/where/ever/it/is

After that all files created under this directory will have group 'somegroup'
If users' umask is 002 (standard on RedHat-like system) then SGID bit on directory + umask will provide all memeber of 'somegroup' with read/write access to all files under /that/folder/where/ever/it/is directory