Command: sudo /etc/init.d/networking restart

Output:

[....] Running /etc/init.d/networking restart is deprecated because it may not r[warnble some interfaces ... (warning).
[....] Reconfiguring network interfaces...wpa_supplicant: /sbin/wpa_supplicant daemon failed to start
run-parts: /etc/network/if-pre-up.d/wpasupplicant exited with return code 1
Failed to connect to wpa_supplicant - wpa_ctrl_open: No such file or directory
wpa_supplicant: /sbin/wpa_cli daemon failed to start
run-parts: /etc/network/if-up.d/wpasupplicant exited with return code 1
RTNETLINK answers: File exists
Failed to bring up eth0.
done.