[CentOS] Set default file/dir permissions?

Thu Aug 26 15:56:41 UTC 2010
Tim Nelson <tnelson at rockbochs.com>

----- "Jorge Fábregas" <jorge.fabregas at gmail.com> wrote:
> On Thursday 26 August 2010 10:35:08 Tim Nelson wrote:
> > I've looked at and tested umask but it only seems to allow/disallow
> > specific permissions, not force permissions. Am I missing something?
> How
> > can I force all files/dirs created under a specific directory to
> have the
> > permissions (and ownership if possible) that I specify?
> 
> Hi,
> 
> You need to jump into ACLs.   You'll do something like:
> 
> http://tinyurl.com/257k9qy
> 
> If you don't want to deal with ACLs and your requirements aren't too
> specific 
> you could set the SGID, bit (Set Group ID) so that every file created
> under the 
> directory will be owned by the group owner of that directory:
> 
> chown myGroup /var/appdata
> chmod g+s /var/adppdata
> 

ACL's do indeed look like the method I'd prefer. Are ACL's part of the filesystem (dependent on ext{2,3,4} etc?) or are they part of the file/inode? My primary reason for asking is I'd like to know if when backing up this data, will the ACL's be included in the backup or will they be lost?

--Tim