Attempting to mount a windows filesystem with -t cifs yields:

 mount error: cifs filesystem not supported by the system

Sure enought:

lsmod | grep cifs

Shows nothing. Doing modprobe cifs gives me:

modprobe: FATAL: Module cifs not found in directory /lib/modules/5.15.6-100.fc34.x86_64+debug

Doing dnf install cifs-utils says:

Package cifs-utils-6.13-3.fc34.x86_64 is already installed.

I even removed that package and reinstalled to no effect. I must be doing something wrong, Fedora wouldn't remove cifs, would it? Thanks.

1 Answer 1


It appears you’re missing the kernel modules package. Since you’re using the debug kernel, you should run

sudo dnf install kernel-debug-modules

You might want the regular kernel instead. To switch to that, make sure it is installed,

sudo dnf install kernel

then reboot into it, and remove the debug kernel (Fedora won’t let you remove the running kernel by default):

sudo dnf remove kernel-debug{,-core,-modules}

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