If you are experiencing long boot times, try this fix:

Comment out all lines in /etc/network/interfaces by puttig a “#” in front of everything except loopback interface:

sudo gedit /etc/network/interfaces

comment out every line (put a # at the beginning of the line) except for this one:

auto loiface lo inet loopback

This is what mine looks like:

auto loiface lo inet loopback
#auto eth0
#iface eth0 inet dhcp
#auto eth1
#iface eth1 inet dhcp
#auto eth2
#iface eth2 inet dhcp
#auto ath0
#iface ath0 inet dhcp
#auto wlan0
#iface wlan0 inet dhcp