[Samba] Share won't mount -- how to debug?

[Rowland Penny]

On Wed, 2021-11-03 at 13:32 -0500, Patrick Goetz via samba wrote:
> 
> On 11/3/21 12:45, Rowland Penny via samba wrote:
> > On Wed, 2021-11-03 at 11:45 -0500, Patrick Goetz via samba wrote:
> > > And the dramatic conclusion is that no, it wasn't the conflicting
> > > group
> > > name interfering with the mount:
> > 
> > OK, if you run this from the DC:
> > 
> > ping -c1 data2
> > 
> > Does it work ?
> > 
> 
> Yes:
> root at samba-dc:~# ping -c1 data2
> PING data2.ea.linuxcs.com (192.168.1.81) 56(84) bytes of data.
> 64 bytes from 192.168.1.81 (192.168.1.81): icmp_seq=1 ttl=64
> time=0.514 ms
> 
> 
> > Then (again on the DC):
> > 
> > smbclient -NL data2
> > 
> > What does that produce ?
> 
> root at samba-dc:~# smbclient -NL data2
> Anonymous login successful
> 
> 	Sharename       Type      Comment
> 	---------       ----      -------
> 	share           Disk      Share Directory
> 	software        Disk      Location for .msi files to be
> automatically 
> installed by AD
> 	IPC$            IPC       IPC Service (Samba 4.15.1-Debian)
> SMB1 disabled -- no workgroup available
> 
> 
> However, one of the shares I set up is inexplicably missing from this
> list:
> 
> [home]
>     comment = Home Directories
>     path = /data/home
>     guest ok = no
>     browseable = no
>     writeable = yes
>     create mask = 0700
>     directory mask = 0700
>     follow symlinks = yes
> 
> 

Strange, it should show, I will do some tests

> 
> 
> > Finally, can you connect via smbclient:
> > 
> > smbclient //data2/share
> > 
> > When logged in as 'mduffy'
> > 
> 
> Hmmm, that one could be tough, as mduffy isn't set up to log on to
> the 
> DC (and won't be), and the only other linux host I have in the
> domain 
> right now is data2

OK, try it like this:

smbclient //data2/share -Umduffy%THE_USERS_PASSWORD

> 
> Let me increase the Samba log level on data2 to see if anything else 
> shows up in log.smbd. If that fails, I can quickly spin up another
> linux 
> host to use for this.
> 
> Meanwhile, just to test:
> 
> root at data2:/data# su - mduffy
> su: warning: cannot change directory to /home/EA/mduffy: No such file
> or 
> directory
> 
> How/where is it deciding to make the home directory
> /home/EA/mduffy?  I 
> don't have anything set up under the user's Profile. Is this a
> default 
> location built into Samba?  For that matter, how is it deciding the 
> default shell is /bin/false?

There are a couple of smb.conf parameters which default to:
template homedir = /home/%D/%U
template shell = /bin/false

%D = Netbios domain name (aka workgroup)
%U = username

However, you will need to tell PAM to create the users homedir upon
logon via SSH or at the terminal or GUI. connecting by Samba is a bit
different, the users homedir will have to exist, or get 'root preexec'
to run a script to do it (I can supply a script if required).

Rowland