zlatev@Zlatev:/etc/network/interfaces.d$ sudo ifdown wlan0 && sudo ifup -v wlan0
ifdown: interface wlan0 not configured
Configuring interface wlan0=wlan0 (inet)
/bin/run-parts --exit-on-error --verbose /etc/network/if-pre-up.d
run-parts: executing /etc/network/if-pre-up.d/ethtool
run-parts: executing /etc/network/if-pre-up.d/ifenslave
+ [ inet = meta ]
+ IF_BOND_SLAVES=
+ [  ]
+ [  ]
+ [ -z  ]
+ exit
run-parts: executing /etc/network/if-pre-up.d/vlan
run-parts: executing /etc/network/if-pre-up.d/wireless-tools
/bin/ip addr add 192.168.0.109/255.255.255.0 broadcast 192.168.0.255 	  dev wlan0 label wlan0
/bin/ip link set dev wlan0   up
 /bin/ip route add default via 192.168.0.1  dev wlan0 onlink
RTNETLINK answers: File exists
Failed to bring up wlan0.