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I have 2 linux machines, 1 VPS and 1 raspberry pi

Problem:

When calling a root function e.g. service "a service" restart both these cases appear different. Some users do not show as possible auth users even though they are in both cases sudoers

VPS:

Authentication is required to manage system services or units.
Multiple identities can be used for authentication:
 1.  user1
 2.  cybex
 3.  ,,, (backup-user)
 4.  steam
Choose identity to authenticate as (1-4): 

Raspberry Pi

user1 and cybex are both users and sudoers (users are in sudoers file and part of sudo group), but they are not listed.

Authentication is needed to run `/usr/bin/nano' as the super user
Multiple identities can be used for authentication:
 1.  ,,, (pi)
 2.  root
Choose identity to authenticate as (1-2):

Why would this happen and be different?

2 Answers 2

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Well, currently sudoers isn't only way to control user privileges on Linux distros. possibly you have polkit based authentication.

To set an user cybex as an administrator for polkit, create a file in /etc/polkit-1/localauthority.conf.d/99-cybex.conf

containing:

[Configuration]
AdminIdentities=unix-user:cybex

that should help, but configuration depends on your Distro, so try to read polkit man page or also check this or this links or google it key name together with your Distro name.

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add yourself to the group sudo, in file /etc/group

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