Questions[samba4](ubuntu)

I have a ubuntu 20.04 server with default samba installation, and a ubuntu 20.04 client mounting the share with:

//xxx.xxx.xxx/share    /home/user1/share     cifs username=user2,noauto,rw,users   0 0

I try to uncompress a 60Mb file from server in the same server folder, and it is painfully slow (~15 minutes). I checked server configuration, but I created a win10 virtual machine on client, connected to the share, and the operation takes less than a minute; so my problem should be on client.

Any idea of how to optimize de mount?

Thanks

I am on Ubuntu Server 20.04, running Samba version 4.11.6-Ubuntu. I need to modify a Samba user account, but I am unable to open sam.ldb due to it apparently not being present. Here is the output:

$ samba-tool user edit username
ltdb: tdb(/var/lib/samba/private/sam.ldb): tdb_open_ex: could not open file /var/lib/samba/private/sam.ldb: No such file or directory

Unable to open tdb '/var/lib/samba/private/sam.ldb': No such file or directory
Failed to connect to 'tdb:///var/lib/samba/private/sam.ldb' with backend 'tdb': Unable to open tdb '/var/lib/samba/private/sam.ldb': No such file or directory
ERROR(ldb): uncaught exception - Unable to open tdb '/var/lib/samba/private/sam.ldb': No such file or directory
  File "/usr/lib/python3/dist-packages/samba/netcmd/__init__.py", line 186, in _run
    return self.run(*args, **kwargs)
  File "/usr/lib/python3/dist-packages/samba/netcmd/user.py", line 2435, in run
    samdb = SamDB(url=H, session_info=system_session(),
  File "/usr/lib/python3/dist-packages/samba/samdb.py", line 65, in __init__
    super(SamDB, self).__init__(url=url, lp=lp, modules_dir=modules_dir,
  File "/usr/lib/python3/dist-packages/samba/__init__.py", line 115, in __init__
    self.connect(url, flags, options)
  File "/usr/lib/python3/dist-packages/samba/samdb.py", line 81, in connect
    super(SamDB, self).connect(url=url, flags=flags,

I cannot list users either. I haven't tried any other subcommands yet.

I checked the folder it's referring to. Here are the contents:

$ ls
msg.sock  netlogon_creds_cli.tdb  passdb.tdb  secrets.ldb  secrets.tdb

The Samba server is running only as a File Server. I'm not running an LDAP (as far as I know). I installed Samba originally under Ubuntu Server 18.04. Other than adding shares to the .conf file I've never made any modifications to the installation.

Everyday morning on my domain controller running samba 4.7.6-ubuntu winbind fails, If I try to run the command wbinfo -u (to list all users) I get the error

could not obtain winbind interface details: WBC_ERR_WINBIND_NOT_AVAILABLE
could not obtain winbind domain name!
Error looking up domain users

As per a question in the comments

sudo systemctl status winbind.service
● winbind.service - Samba Winbind Daemon
   Loaded: loaded (/lib/systemd/system/winbind.service; enabled; vendor preset: enabled)
   Active: failed (Result: exit-code) since Mon 2019-10-21 15:51:08 BST; 1h 51min ago
     Docs: man:winbindd(8)
           man:samba(7)
           man:smb.conf(5)
  Process: 1249 ExecStart=/usr/sbin/winbindd --foreground --no-process-group $WINBINDOPTIONS (code=exited, status=1/FAILURE)
 Main PID: 1249 (code=exited, status=1/FAILURE)

Oct 21 15:51:07 pluto systemd[1]: Starting Samba Winbind Daemon...
Oct 21 15:51:08 pluto systemd[1]: winbind.service: Main process exited, code=exited, status=1/FAILURE
Oct 21 15:51:08 pluto systemd[1]: winbind.service: Failed with result 'exit-code'.
Oct 21 15:51:08 pluto systemd[1]: Failed to start Samba Winbind Daemon.

Anybody else run into this issue ?

I'm following this tutorial for making an Ubuntu active directory domain controller with Samba.

The problem I have run into, is that he is using Ubuntu Server 13.10, and I am using the latest, 18.04. Somewhere between these 2 versions, Ubuntu stopped using /etc/network/interfaces and started using netplan.

Therefore, when he says to modify /etc/network/interfaces, and add:

auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static

address 192.168.2.100
netmask 255.255.255.0
network 192.168.2.0
broadcast 192.168.2.255
gateway 192.168.2.1
dns-nameservers 192.168.1.100 8.8.8.8
dns-search <domain name>.local

I get an error message that says:

ifupdown has been replaced by netplan(5) on this system.

I did some research, and found that now this should be stored in /etc/netplan/01-netcfg.yaml. This file does not exist. Should I create it? Also, what is the equivalent of what he said to put in the file, for netplan?

Edit: The output for ls /etc/netplan is 50-cloud-init.yaml, and the output for cat /etc/netplan/*.yaml is:

# This file is generated from information provided by
# the datasource.  Changes to it will not persist across an instance.
# To disable cloud-init's network configuration capabilities, write a file
# /etc/cloud/cloud.cfg.d/99-disable-network-config.cfg with the following:
# network: {config: disabled}
network:
    ethernets:
        enp0s3:
            addresses: []
            dhcp4: true
            optional: true
    version: 2

Can someone tell me when Ubuntu comes with a newer version of there samba 4 package. The current version is samba 4.3.11-Ubuntu.

When I look at the Samba site, this version is EOL, and already as of 2017-03-11.