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[Help] Unable to write files to an SMB share on a NAS (lemmy.dbzer0.com)

submitted 6 months ago* (last edited 6 months ago) by Eric_Pollock@lemmy.dbzer0.com to c/linux@lemmy.ml

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Edit: I found the solution! All I had to do was add the uid with my username, then I also had to add "forceuid" for it to actually go through. My fstab entry now looks like:

//192.168.1.21/Media-Library /mnt/Home-NAS/Media-Library cifs user=Jellyfin,password=password,uid=my_uid,forceuid,iocharset=utf8 0 0

Thank you @lemmyreader@lemmy.ml for posting the solution from Stack Exchange!

Hello! I have an Ubuntu server with a NAS mounted using cifs-utils, and I've created an entry in fstab for the share to be mounted at boot.

My fstab entry looks like this:

//192.168.1.21/Media-Library /mnt/Home-NAS/Media-Library cifs user=Jellyfin,password=password,iocharset=utf8 0 0

(The password is not actually "password" of course)

However, while I'm able to access the share perfectly fine, and even have a Jellyfin server reading from it, I cannot write files to the share without using sudo. I have some applications that manage metadata for music, and they're not able to change or add files in any way.

I am however able to access the share from my Fedora machine just fine with the same credentials, since I use KDE, I just added them to the default "Windows Share Credentials" setting. I don't have the issue where I have to use sudo to modify files, so I know it's just an issue with the share mounted to the server and not permission issues on the NAS itself.

What am I doing wrong?

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[–] tvcvt@lemmy.ml 6 points 6 months ago* (last edited 6 months ago)

To amplify RedWeasel’s very good answer, fstab runs as root and unless you specify otherwise, the share will mount with root as the owner on the local machine. From the perspective of the Samba server, it’s the Jellyfin user accessing the files, but on the local machine, but local permissions come into play as well. That’s why you can get at the files when you connect to the share from Dolphin in your KDE system—it’s your own user that’s mounting the share locally.