o correto é:
sudo gedit /etc/network/interfaces
Saúde
Aconteceu o seguinte quando digitei :
** (gedit:8884): CRITICAL **: gedit_mdi_set_state: assertion `GEDIT_IS_MDI (mdi)' failed
(gedit:8884): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `BonoboMDI'
** (gedit:8884): CRITICAL **: bonobo_mdi_get_active_child: assertion `BONOBO_IS_MDI (mdi)' failed
(gedit:8884): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `BonoboMDI'
** (gedit:8884): CRITICAL **: bonobo_mdi_get_active_window: assertion `BONOBO_IS_MDI (mdi)' failed
** (gedit:8884): CRITICAL **: gedit_utils_set_status: assertion `BONOBO_IS_WINDOW (win)' failed
** (gedit:8884): CRITICAL **: gedit_prefs_manager_get_int: assertion `gedit_prefs_manager->gconf_client != NULL' failed
** (gedit:8884): CRITICAL **: gedit_prefs_manager_get_bool: assertion `gedit_prefs_manager->gconf_client != NULL' failed
** (gedit:8884): CRITICAL **: gedit_prefs_manager_get_bool: assertion `gedit_prefs_manager->gconf_client != NULL' failed
** (gedit:8884): CRITICAL **: gedit_prefs_manager_get_int: assertion `gedit_prefs_manager->gconf_client != NULL' failed
(gedit:8884): GLib-GObject-WARNING **: invalid uninstantiatable type `<invalid>' in cast to `GObject'
(gedit:8884): GLib-GObject-WARNING **: instance of invalid non-instantiatable type `<invalid>'
(gedit:8884): GLib-GObject-CRITICAL **: g_signal_connect_object: assertion `G_TYPE_CHECK_INSTANCE (instance)' failed