mount.cifs gives me "mount error: cifs filesystem not supported by the system"

Question

i try to mount a OneDrive Folder to my Linuxserver. However, as i try mout.cifs with XXX beeing the correct values...

root@XXX:~# mount.cifs //onedrive.live.com/about/en-us/signin/ /usr/plex/share -o user='XXX',password='XXX'

...it returns:

mount error: cifs filesystem not supported by the system
mount error(19): No such device

I installed cifs-utils without any errors. (version 2:6.8-1)

My dear friend google lead me to some websites telling me to check some things:

1.

zgrep -i cifs /proc/config.gz

returns nothing.

2.

modprobe cifs

returns:

modprobe: ERROR: ../libkmod/libkmod.c:514 lookup_builtin_file() could not open builtin file '/lib/modules/4.15.0/modules.builtin.bin'
modprobe: FATAL: Module cifs not found in directory /lib/modules/4.15.0

3.

I tried updating packages, reinstalling cifs-utils, upgrading the kernel, rebooting and recompiling the kernel. Nothing worked for me.

4.

uname -r

returns:

4.15.0

5.

lsb_release -a

returns:

No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.1 LTS
Release:        18.04
Codename:       bionic

6. the samba-service is up and running.

service smbd status

returns

● smbd.service - Samba SMB Daemon
   Loaded: loaded (/lib/systemd/system/smbd.service; enabled; vendor preset: enabled)
   Active: active (running) since Sun 2019-02-03 05:19:03 CET; 29min ago
     Docs: man:smbd(8)
           man:samba(7)
           man:smb.conf(5)
 Main PID: 561 (smbd)
   Status: "smbd: ready to serve connections..."
    Tasks: 5 (limit: 165)
   CGroup: /system.slice/smbd.service
           ├─ 561 /usr/sbin/smbd --foreground --no-process-group
           ├─ 662 /usr/sbin/smbd --foreground --no-process-group
           ├─ 664 /usr/sbin/smbd --foreground --no-process-group
           ├─ 768 /usr/sbin/smbd --foreground --no-process-group
           └─1570 /usr/sbin/smbd --foreground --no-process-group

Feb 03 05:46:52 XXX.net smbd[2050]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:46:52 XXX.net smbd[2052]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:46:53 XXX.net smbd[2054]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:46:56 XXX.net smbd[2055]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:46:56 XXX.net smbd[2056]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:46:58 XXX.net smbd[2057]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:47:11 XXX.net smbd[2059]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:47:15 XXX.net smbd[2064]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:48:15 XXX.net smbd[2073]: pam_unix(samba:session): session closed for user nobody
Feb 03 05:48:20 XXX.net smbd[2076]: pam_unix(samba:session): session closed for user nobody

However, the last lines seem a bit strange to me.

So finally, i am left with no idear. I searched the web for hours but the only soloution i could find was recompilling the kernel. Obvoiusly that did not work for me.

I hope someone can help me. If you need more information, please give me the exact command line as i am relatively new to linux.

Thank you in advance!

Greeting Smallmountains

PS: Please excuse my bad english. Thanks.

--------UPDATE----------

The command

find /lib/modules/ -name cifs.ko

returs a buch of kernal names:

/lib/modules/4.15.0-1019-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1036-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1019-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-33-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1019-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1011-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-38-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1009-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1022-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1006-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1021-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1008-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1012-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1023-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1025-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1024-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-39-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-42-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1020-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-43-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1025-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-23-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1008-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1012-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1028-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1004-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1031-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1023-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1025-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-30-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1027-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1009-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1028-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1024-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1015-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1016-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-32-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1029-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-33-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1030-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1017-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1023-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1018-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1035-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1007-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-29-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1012-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1009-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1021-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1006-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1021-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1014-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1028-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1015-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-32-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1017-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-36-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1026-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1013-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1021-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-22-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1027-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-23-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1010-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1021-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1019-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1017-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-36-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1010-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1018-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1011-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-29-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1007-oracle/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-38-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-39-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1031-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1032-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-20-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1020-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1008-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1010-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1014-azure/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-42-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1030-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-24-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-43-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1016-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-30-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-34-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-24-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1018-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-22-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1025-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1023-aws/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-20-lowlatency/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1009-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-34-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1026-kvm/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1026-gcp/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1017-oem/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-1013-azure/kernel/fs/cifs/cifs.ko

Which one should i choose? And do i use the....

GRUB_DEFAULT='Example GNU/Linux distribution'

...in the file...

/etc/default/grub

to choose what kernal to boot into? Remember, i do have acces to the server only via ssh after the boot process ist sucessfull. I cannot choose a kernal during boot on a screen.

Thank you in advance. Greetings: Smallmountain

Solution

You are not running the kernel shipped with ubuntu:

uname -r
returns:

4.15.0

It should have been 4.15.0-45-generic in current ubuntu 18.04.

Run this to find out which installed kernels have the cifs.ko module on your system, and reboot into that kernel: find /lib/modules/ -name cifs.ko.

On my 18.04 system, for example:

root@nsnx:~# uname -r
4.15.0-45-generic
root@nsnx:~# find /lib/modules/ -name cifs.ko
/lib/modules/4.15.0-44-generic/kernel/fs/cifs/cifs.ko
/lib/modules/4.15.0-45-generic/kernel/fs/cifs/cifs.ko

If you do see a cifs.ko module for your custom 4.15.0 kernel, maybe all you need to do is run depmod -a.

Comments

[Smallmountains]

Thank you very much for your aswer! I updeated the aswer, so i could print the result of the "find /lib/modules/ -name cifs.ko".

[Zanna]

We still need to compile the kernel for that though, right? I think this answer needs a lot more detail. New users won't be aware of the context of menuconfig

[Alborz]

for new zImage is a make on Host necessary