= Linux Mint 18
== Impresora
cambiar permisos de servidor de impresión: [[http://unix.stackexchange.com/questions/21074/dont-require-root-to-add-printers]]

== sacar a un usuario de la pantalla de logon
  - ''sudo vim /usr/share/mdm/defaults.conf''
  - buscar ''Exclude'' y cambiar ''nobody'' por la lista de usuarios que no se quiere que aparezca

o

  - ajusta el UID del usuario(s) que no queremos que aparezcan por debajo del "habitual" (1000)
  - ''sudo vim /usr/share/mdm/defaults.conf''
  - buscar ''MinimalUID=1000'' y cambiar por el UID a nuestra conveniencia

/via: [[https://forums.linuxmint.com/viewtopic.php?t=178215]]

== system policy prevents modification of network settings for all users
un usuario no-admin no puede conectarse a nuevas redes WIFI, pide permisos de admin (sudo) para añadir la nueva red.

[[http://askubuntu.com/questions/244567/remove-sudo-password-when-connecting-to-new-wifi-network]]

<code bash /etc/polkit-1/localauthority/50-local.d/10-network-manager.pkla>[Let user pupil modify system settings for network]
Identity=unix-user:<user>
Action=org.freedesktop.NetworkManager.settings.modify.system
ResultAny=no
ResultInactive=no
ResultActive=yes</code>

otra posible solución, que dicen funciona en Ubuntu 14.04 LTS & 16.04 LTS:
  - ''su -''
  - ''nano /usr/share/polkit-1/actions/org.freedesktop.NetworkManager.policy''
  - Towards the end of the file, find the section labeled:''<action id="org.freedesktop.NetworkManager.settings.modify.system">''
  - At the the bottom of the org.freedesktop.NetworkManager.settings.modify.system Section, locate the following line of code: ''<allow_active>auth_admin_keep</allow_active>''
  - Change this line to read as follows: ''<allow_active>yes</allow_active>''
  - Restart