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Access Ubuntu super-user area using Samba

Skjori
Skjori used Ask the Experts™
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Does anyone know how I can gain access to a super-user area (e.g. /etc ) using Samba?
As I understand, there's no root-user in Ubuntu, only normal users with su privileges..(?)
I run Samba, and has added samba-password to a user with su-privileges. I can access files on this user's home-area, but can't get write-access to other areas even though these are shared.
Suggestions?
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1. No, root-user still exists.  You can do as follows to change root password (from the terminal prompt):

   $ sudo -i
   Password: <your_password>
   # passwd
   Password: <root_password>

  after that, you can login to root (at console) normally

2. With Samba shares, you can set write permission with following options in /etc/samba/smb.conf

[ShareName]
  path = /opt
  ...
  writable = yes
  valid users = someone
  write list = someone @somegroup
  ...