enterprise-support team mailing list archive

[Rene Herman <1789097@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

[copied from the Linux Mint forum]

Just installed Mint 19 and noticed a WINS name resolution buglet. I
assume this applies to Ubuntu 18.04 as well.

Windows, i.e., NetBIOS, name resolution is on Linux provided for by the
"winbindd" daemon, part of the Samba suite. One does not need either of
the other two Samba daemons "smbd" and "nmbd" when NetBIOS name
resolution is all you need: sudo apt-get install libnss-winbind (which
additionally pulls in "winbind" itself) and adding "wins" before "dns"
to the "hosts" line of /etc/nsswitch.conf is enough.

While this works fine directly after installation it does no more after
reboot due to a systemd unit file dependency issue. The standard
/lib/systemd/system/winbind.service orders itself after "network.target"
and "nmbd.service" which if you do not in fact have "samba" hence
"nmbd.service" installed amounts to "network.target" only. It however
needs "network-online.target" -- itself a dependency of "smbd.service"
if you do have that installed as well.

You can solve things by copying the unit file to its corresponding
directory under /etc and editing it,

  sudo cp /{lib,etc}/systemd/system/winbind.service
  xed admin:/etc/systemd/system/winbind.service

to change the line

  After=network.target nmbd.service

to the two lines

  After=network-online.target nmbd.service
  Wants=network-online.target

After save and reboot you will have NetBIOS name resolution functional
without all of the rest of Samba running.

Note that although this fix is not needed when you do have "samba"
itself installed the above is still fine also the

** Affects: samba (Ubuntu)
     Importance: Undecided
         Status: New

-- 
You received this bug notification because you are a member of Ubuntu
Server/Client Support Team, which is subscribed to samba in Ubuntu.
Matching subscriptions: Ubuntu Server/Client Support Team
https://bugs.launchpad.net/bugs/1789097

Title:
  winbind does not work after reboot on Mint 19 / Ubuntu 18.04

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/samba/+bug/1789097/+subscriptions