Linux Permissions

[mmaki]

What Linux permissions do I give a directory if I want the users, who are members of the group the directory is in, to be able to read and write but not delete (except for the owner/creator)? I understand this has to do with the SUID/SGID and Sticky Bit which I can't seem to get quite right.

For example I have a shared directory in a division under home that I want all users of the division (admin) to be able to read and write but not delete.

/home/admin/shared

All users in admin are members of the admin group and the "shared" directory is in the group admin. Home, admin, and shared are owned by root.

Thanks!

 

[Damaged]

Give those users read only permission on the directory itself, not the individual files. Then set the stick bit on the directory chmod g+s <directory name..

If you do that any time a user wants to rename or delete a file they must either: A) own the file themselves; B) have write permission for the directory; C) or be root.

 

[TonyRic]

Your question on read/write but no delete will require the use of ACL's. Basic permissions on files and directories do not give you that wide of a setting. It gives you read, write and execute only, and write means write which always includes delete.

 

[mmaki]

TonyRic &amp; Damaged thanks for the replies. I've done a little research since my posting and this is what I found. I don't think I need to deal with ACL's because of the sticky bit, but again I'm a newbie at this so I could very well be wrong. When I get back to the office next week I do some experimenting with this and see what I can come up with. Thanks again!