Login to FreeNAS via Passwordless SSH - GNU/Linux

I found this solution on the FreeNAS forums. It's not very straightforward, in my opinion, to setup SSH passwordless login on FreeNAS.

Taken from FreeNAS forums:

What you need to do to customize your server for passwordless authentication:

1. From WebGUI|Advanced|Execute command or shell
   1. protect the /mnt directory by setting the mode to 755(we don't want users to write on /mnt, that can fill up the RAM disk and crash the system.
      
      You must change the mod as startup command, after each reboot.
      
      

      Code:

      
      

      chmod 755 /mnt

   2. For your safety change the mode for each mount, or at least one "mount".
      
      

      Code:

      
      

      chmod 755 /mnt/mount

   3. Create the user(A) home directory /mnt/mount/userA
      
      

      Code:

      
      

      mkdir /mnt/mount/userAdir

   4. Make userA the owner of his home directory
      
      

      Code:

      
      

      chown userA /mnt/mount/userAdir

   5. Secure userA home directory
      
      

      Code:

      
      

      chmod 700 /mnt/mount/userAdir

2. Set userA home directory on WebGUI|Access|Users|Edit|Home directory to point to /mnt/mount/userAdir


3. From your remote client(ssh/PuTTy)
   1. Check if home directory is set corectly for userA. The output should be /mnt/mount/userAdir
      
      

      Code:

      
      

      ssh -p 22 userA@FreeNASip 'pwd'

   2. Create the .ssh directory
      
      

      Code:

      
      

      ssh -p 22 userA@FreeNASip 'mkdir .ssh'

   3. Upload your id_rsa.pub or id_dsa.pub to remote .ssh directory.
      
      

      Code:

      
      

      cat id_rsa.pub | ssh -p 22 userA@FreeNASip 'cat >> .ssh/authorized_keys'

   4. Change the .ssh dir mode
      
      

      Code:

      
      

      ssh -p 22 userA@FreeNASip 'chmod -R 700 ~/.ssh'

4. Now try to login passwordless.