I know how to modify interfaces file to enable raspberry pi work under WIFI. But for raspberry pi 2, installed of snappy ubuntu, the file is on a read-only file system and I cannot modify it. Like below:
ubuntu@localhost:/etc/network$ cat interfaces # interfaces(5) file used by ifup(8) and ifdown(8) # Include files from /etc/network/interfaces.d: source-directory /etc/network/interfaces.d ubuntu@localhost:/etc/network$ touch 1 touch: cannot touch ?.?. Read-only file system
Without modifying it, I cannot enable the USB WIFI dongle. How to solve it?