[Samba] Some doubts.

[rvt at dds.nl]

Citeren Jason Stewart <jstewart at rtl.org>:

> Hello, Joao.
> 
> I have been using Samba for awhile and I will try my best to answer some of
> 
> your questions. If I do not have the complete answer, maybe someone else 
> can elaborate also.
> 
> Here goes...
> 
> >1 When at the Linux side we create a directory to share what permissions 
> >should we give?
> 
> Depends on who you want to share it with. If you want to allow everyone 
> read/write access, permissions should be 666 (This would be the scenario 
> for a true 'share' directory where everyone has access. The first '6 ' 
> means owner read/write, the second means group read/write, and the last 
> means 'everyone' read/write. 600 if you only want owner access to files. 
> You can read more about how these permissions are calculated in any good 
> UNIX book (or read the man page for chmod). There are directives in the 
> smb.conf that can enforce certain permissions also.
This also depends on the 'force group'and 'force user' setting.
Take a look at the manual page for a explanation but it goes something like 
this:

If you don't want to everybody can rw your files but several groups need to 
access the file you can set the permissions in samba and the share like this:
[some_share]
  comment = test share
  path=/home/samba/some_share
  force group = testgroup
  create mask = 0660
  directory mask = 0770

username:testgroup  0660  /home/samba/some_share/testfile.txt

Now everybody in the testgroup can read and write our 'testfile.txt' while 
other usercannot access them. Also two users with different pripmary groups can 
access and read/write this file without getting a access denied.

> 
> 
> 
> >2 What is the benefit of having the shared directory on a XFS partition?
> 
> ACLs  with samba. If you compile samba --with-acl-support, you can modify 
> acls on the share throught the windows NT/2000 dialog box. XFS is supposed 
> to be a good journaling filesystem, although I don't know too much about it
> 
> since I have never used it.
What do you mean here by shared directory?
XFS is a great journaling filesystem with ACL support!

> 
> 
> >3 I it possible on a subdirectory of a Samba share modify the permissions 
> >so that they are different from the parent?
> 
> I'm not quite sure of what you mean here, but you can do that on any 
> filesystem that I can think of. Do you mean that you want to create a new 
> share that is nested under a share on an upper-level directory?
> 

Take a look at the 'inherit permissions' parameter. I think this is what you 
want.

> 
> >4 Perhaps someone can advise me of what are the minimum Linux installation
> 
> >for having just Samba and some administration?
> 
> It really depends on the distribution. It also depends on what utilities 
> that you are using to do the administration. I can get a slackware 
> installation with samba and some bare shell utilities installed in under 
> 100MB. I have tried to do the same with Red Hat Linux and haven't even come
> 
> close so far.
Samba and Linux is extreemly lighweight so you can run a 25 user setup and 
possibly more on one server on a 486 with 64 Mb. But I never did some real 
world testing.

> 
> 
> >5 What is the best practice for updating a Samba installation?
> 
> I would definitely back everything up first. In my experience, Samba does 
> not overwrite any of its application data when compiling it from the source
> 
> and installing. I do not know if the RPMs back up the binaries first, since
> 
> I do not use the RPM. Back up your all samba stuff like the directories 
> where your browse lists are, your smb.conf, and your smbpasswd. You can't 
> be too careful.
> 
> Make sure that when you are done upgrading, that you kill the old smdb/nmbd
> 
> daemons and start them again (not just an HUP). I know that it sounds 
> funny, but this one bit me in the butt awhile back.

I always do the compilate myself with a simple shell script so I know that 
eatch compilation is exacly the same and then I install the server. I do this 
on a production system when in bussiness and never had a single problem.

> 
> 
> >
> >
> >I think that by now is all, and I hope to get some help.
> 
> I hope that some of this helps you.
> 
> 
> 
> >
> >
> >Thanks in advance to the community,
> >
> >
> >
> >Best Regards,
> >
> >Joao Alexandre
> 
> Good luck with Samba and Linux.
> 
> 
> 
> >
> 
> Jason Stewart
> Systems Administrator/Programmer
> Right to Life of Michigan
> Tel: (616)532-2300
> Fax: (616)532-3461
> 
> 
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