Samba not working under ubuntu 21.10 impish

my samba has stopped working on Ubuntu 21.10 impish not sure when it started but I get this on start:

$ sudo service smbd restart
[sudo] password for username:
Job for smbd.service failed because the control process exited with error code.
See "systemctl status smbd.service" and "journalctl -xeu smbd.service" for details.

when I run the commands it says to I get:

$ systemctl status smbd.service
× smbd.service - Samba SMB Daemon Loaded: loaded (/lib/systemd/system/smbd.service; enabled; vendor preset: enabled) Active: failed (Result: exit-code) since Wed 2021-11-10 04:07:54 AEDT; 2min 6s ago Docs: man:smbd(8) man:samba(7) man:smb.conf(5) Process: 160601 ExecStartPre=/usr/share/samba/update-apparmor-samba-profile (code=exited, status=0/SUCCESS) Process: 160610 ExecStart=/usr/sbin/smbd --foreground --no-process-group $SMBDOPTIONS (code=exited, status=255/EXCEPTION) Main PID: 160610 (code=exited, status=255/EXCEPTION) Status: "Starting process..." CPU: 44ms
Nov 10 04:07:54 pern smbd[160610]: Ignoring unknown parameter "winbind trusted domains only"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.175944, 0] ../../source3/auth/auth_util.c:1313(get_guest_info3)
Nov 10 04:07:54 pern smbd[160610]: SamInfo3_for_guest: Unable to locate guest account []!
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.175995, 0] ../../source3/auth/auth_util.c:1385(make_new_session_info_guest)
Nov 10 04:07:54 pern smbd[160610]: get_guest_info3 failed with NT_STATUS_NO_SUCH_USER
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.176018, 0] ../../source3/smbd/server.c:2052(main)
Nov 10 04:07:54 pern smbd[160610]: ERROR: failed to setup guest info.
Nov 10 04:07:54 pern systemd[1]: smbd.service: Main process exited, code=exited, status=255/EXCEPTION
Nov 10 04:07:54 pern systemd[1]: smbd.service: Failed with result 'exit-code'.
Nov 10 04:07:54 pern systemd[1]: Failed to start Samba SMB Daemon.

and

Subject: A start job for unit smbd.service has failed
░░ Defined-By: systemd
░░ Support:
░░
░░ A start job for unit smbd.service has finished with a failure.
░░
░░ The job identifier is 14803 and the job result is failed.
Nov 10 04:07:54 pern systemd[1]: Starting Samba SMB Daemon...
░░ Subject: A start job for unit smbd.service has begun execution
░░ Defined-By: systemd
░░ Support:
░░
░░ A start job for unit smbd.service has begun execution.
░░
░░ The job identifier is 20143.
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.170769, 0] ../../lib/param/loadparm.c:815(lpcfg_map_parameter)
Nov 10 04:07:54 pern smbd[160610]: Unknown parameter encountered: "password level"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.170806, 0] ../../lib/param/loadparm.c:1855(lpcfg_do_global_parameter)
Nov 10 04:07:54 pern smbd[160610]: Ignoring unknown parameter "password level"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.170933, 0] ../../lib/param/loadparm.c:815(lpcfg_map_parameter)
Nov 10 04:07:54 pern smbd[160610]: Unknown parameter encountered: "update encrypted"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.170944, 0] ../../lib/param/loadparm.c:1855(lpcfg_do_global_parameter)
Nov 10 04:07:54 pern smbd[160610]: Ignoring unknown parameter "update encrypted"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.171032, 0] ../../lib/param/loadparm.c:815(lpcfg_map_parameter)
Nov 10 04:07:54 pern smbd[160610]: Unknown parameter encountered: "winbind trusted domains only"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.171040, 0] ../../lib/param/loadparm.c:1855(lpcfg_do_global_parameter)
Nov 10 04:07:54 pern smbd[160610]: Ignoring unknown parameter "winbind trusted domains only"
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.175944, 0] ../../source3/auth/auth_util.c:1313(get_guest_info3)
Nov 10 04:07:54 pern smbd[160610]: SamInfo3_for_guest: Unable to locate guest account []!
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.175995, 0] ../../source3/auth/auth_util.c:1385(make_new_session_info_guest)
Nov 10 04:07:54 pern smbd[160610]: get_guest_info3 failed with NT_STATUS_NO_SUCH_USER
Nov 10 04:07:54 pern smbd[160610]: [2021/11/10 04:07:54.176018, 0] ../../source3/smbd/server.c:2052(main)
Nov 10 04:07:54 pern smbd[160610]: ERROR: failed to setup guest info.
Nov 10 04:07:54 pern systemd[1]: smbd.service: Main process exited, code=exited, status=255/EXCEPTION
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support:
░░
░░ An ExecStart= process belonging to unit smbd.service has exited.
░░
░░ The process' exit code is 'exited' and its exit status is 255.
Nov 10 04:07:54 pern systemd[1]: smbd.service: Failed with result 'exit-code'.
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support:
░░
░░ The unit smbd.service has entered the 'failed' state with result 'exit-code'.
Nov 10 04:07:54 pern systemd[1]: Failed to start Samba SMB Daemon.
░░ Subject: A start job for unit smbd.service has failed
░░ Defined-By: systemd
░░ Support:
░░
░░ A start job for unit smbd.service has finished with a failure.
░░
░░ The job identifier is 20143 and the job result is failed.

what is wrong?? it complains about lack of guest account but I do no want or use a guest account???

2 Answers

Solved I created a user that cannot login and made that the the guest user, now I realise I could have made it user nobody seem to have the same properties then smbd started fine

Samba also not working for me in Impish, slightly different error message. Apparently related to unmasked samba-ad-dc.service. This service has always been masked in the past, as I am fairly certain it conflicts with the client or file server-only version of Samba (the one almost everybody uses).

Error message:

$ sudo apt install -y samba
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
The following additional packages will be installed: python3-samba samba-common samba-common-bin samba-dsdb-modules samba-libs samba-vfs-modules
Suggested packages: bind9 bind9utils ctdb ldb-tools ntp | chrony smbldap-tools ufw winbind heimdal-clients
Loaded services file OK.
Weak crypto is allowed
Server role: ROLE_STANDALONE
Done
Setting up samba (2:4.13.14+dfsg-0ubuntu0.21.10.4) ...
Samba is not being run as an AD Domain Controller: Masking samba-ad-dc.service
Please ignore the following error about deb-systemd-helper not finding those services.
(samba-ad-dc.service masked)
Created symlink /etc/systemd/system/ → /lib/systemd/system/nmbd.service.
Created symlink /etc/systemd/system/ → /lib/systemd/system/samba-ad-dc.service.
Created symlink /etc/systemd/system/ → /lib/systemd/system/smbd.service.
Job for samba-ad-dc.service failed because the control process exited with error code.
See "systemctl status samba-ad-dc.service" and "journalctl -xeu samba-ad-dc.service" for details.
Processing triggers for man-db (2.9.4-2) ...
Processing triggers for libc-bin (2.34-0ubuntu3) ...

apt said See "systemctl status samba-ad-dc.service" and "journalctl -xeu samba-ad-dc.service" for details., so...

$ sudo journalctl -xeu samba-ad-dc.service
░░
░░ The job identifier is 4924.
Dec 14 01:48:10 uminefi01 systemd[1]: samba-ad-dc.service: Main process exited,>
░░ Subject: Unit process exited
░░ Defined-By: systemd
░░ Support:
░░
░░ An ExecStart= process belonging to unit samba-ad-dc.service has exited.
░░
░░ The process' exit code is 'exited' and its exit status is 1.
Dec 14 01:48:10 uminefi01 systemd[1]: samba-ad-dc.service: Failed with result '>
░░ Subject: Unit failed
░░ Defined-By: systemd
░░ Support:
░░
░░ The unit samba-ad-dc.service has entered the 'failed' state with result 'exi>
Dec 14 01:48:10 uminefi01 systemd[1]: Failed to start Samba AD Daemon.
░░ Subject: A start job for unit samba-ad-dc.service has failed
░░ Defined-By: systemd
░░ Support:
░░
░░ A start job for unit samba-ad-dc.service has finished with a failure.
░░
░░ The job identifier is 4924 and the job result is failed. ESCOC

Took your recommendation to create a user nobody (I don't think was necessary for this particular solution, but seemed like a good idea):

$ sudo smbpasswd -a nobody
New SMB password: [enter on blank line]
Retype new SMB password: [enter on blank line]
Added user nobody.

Masked the samba-ad-dc.service unit:

systemctl mask samba-ad-dc.service
Created symlink /etc/systemd/system/samba-ad-dc.service → /dev/null.

Ran package management autofixes:

$ sudo dpkg -a --configure && sudo apt --fix-broken install
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

Enabled stand-alone Samba services (the 'normal' ones):

systemctl enable --now smbd nmbd
Synchronizing state of smbd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable smbd
Synchronizing state of nmbd.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable nmbd

Ran testparm on generic package-maintainer's smb.conf, said all good ...

My cockpit-zfs-manager from 45Drives works again ...