CIFS Mount Synology Share

[the.geremy]

Hi all,

I try to mount via CIFS Synology share, I am able to do so manually via user and password, but when I try to use credentials file it wont work.
I try many versions of credential file

nameuser=<username>
password=<password>

empty line at bottom or not, even with domain but nothing is working

I really confused because this works:

sudo mount -t cifs //server/share /mnt/.../.. -o username=username,password=password,rw,dir_mode=0777,file_mode=0777,vers=3.0
​

but same with creds is not working

sudo mount -t cifs //server/share /mnt/.../.. -o credentials=/path/to/creds,rw,dir_mode=0777,file_mode=0777,vers=3.0
​

System:
Distributor ID:Ubuntu
Description:Ubuntu 25.10
Release:25.10
Codename:questing
Kernel:6.17.0-14-generic

Thank you

[Snowhog]

AI Overview

To mount a CIFS/SMB Synology share using a credentials file in Linux, create a hidden file (e.g.,
/root/.smbcredentials) containing your NAS username and password, secure it with chmod 600, and reference it in /etc/fstab with the credentials= option. This avoids storing passwords in plain text within fstab.

Step-by-Step Configuration

1. Create the Credentials File:
Create a new file, for example, /root/.smbcredentials or /home/youruser/.smbcredentials.

sudo nano /root/.smbcredentials

2. Add Credentials:
Add the following lines to the file, replacing with your Synology NAS details:

username=your_synology_user
password=your_synology_password
domain=WORKGROUP # Optional, default is WORKGROUP

3. Secure the File:
Restrict permissions so only root can read it:

sudo chmod 600 /root/.smbcredentials

4. Configure /etc/fstab:
Add your mount entry to /etc/fstab to use the file.

//192.168.x.x/sharename /mnt/synology cifs credentials=/root/.smbcredentials,uid=1000,gid=1000,iocharset=utf8,v ers=3.0,nofail 0 0

Note: uid and gid ensure your local user owns the mounted files.
Note: vers=3.0 is recommended for modern Synology NAS systems.

5. Mount the Share:
Test the configuration:

sudo mount -a