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I have been using the following fstab entry on my ubuntu 22.04 client, for mounting a directory on an Ubuntu 20.04 server:
//nas/plex /home/USER/nas/plex cifs uid=0,credentials=/home/USER/somefile,iocharset=utf8,noperm,noauto,user 0 0
Something has changed, and now this no longer works. The error in dmesg is:
[ 3679.254486] CIFS: Attempting to mount \nas\plex [ 3679.259733] CIFS: VFS: cifs_mount failed w/return code = -22
I have tried removing each option separately, but nothing changes.
IIRC, the error code 22 indicates a networking issue. The first thing I usually try is to replace the network name with its IP address; i.e.
//192.168.1.55/plex /home/USER/nas/plex cifs uid=0,credentials=/home/USER/somefile,iocharset=utf8,noperm,noauto,user 0 0
After some more searching, my Ubuntu server must have changed SMB versions. I added "vers=3.0" to the options. Now it mounts as before.
