Allow user to create files but not edit/delete

[Loïc Grenié]

2011/6/7 Colin Law <clanlaw at googlemail.com>:
> On 7 June 2011 13:43, Loïc Grenié <loic.grenie at gmail.com> wrote:
>> 2011/6/7 Colin Law <clanlaw at googlemail.com>:
>>> Is there a way to setup permissions and ownership such that a user can
>>> create new files in a particular directory, and can read existing
>>> ones, but cannot edit or delete existing ones?  By giving ownership of
>>> the directory and existing files to root,  with permissions 777 on the
>>> directory and 774 on existing files, then the user has read-only
>>> access to existing files and can create new files, but unfortunately
>>> he can delete existing files and re-create them, hence effectively
>>> editing them.  Is there any way around this?
>>
>> chmod 1777 dir
>
> Of course, I did not read far enough down the ubuntu permissions wiki
> page [1], I switched off when it started talking about Posix ACLs,
> thinking it had finished with the basic stuff.
>
> Many thanks

    You're welcome.

        Loïc