UFW Enable requires y prompt, how to automate with Bash Script?

Question

I'm trying to automate the setup of UFW on an Ubuntu 16.04 instance. However when I type:

sudo ufw enable

I get prompted to enter yes or no, is there a way to feed it yes or set it automatically to start without getting stuck with a prompt?

score 38 · Answer 1 · answered Jan 09 '17 at 11:04

38

You could use:

$ sudo ufw --force enable

answered Jan 09 '17 at 11:04

Everaldo Canuto

2

I had to check the manpage to be sure `--force` doesn't do anything unexpected: "By default, ufw will prompt when enabling the firewall while running under ssh. This can be disabled by using 'ufw --force enable'." – Nickolay Jan 13 '22 at 04:53
This should be the correct answer. – Deckard Sep 15 '22 at 06:58

score 27 · Accepted Answer · answered Jul 16 '16 at 00:46

27

How about:

$ echo "y" | sudo ufw enable

answered Jul 16 '16 at 00:46

EEAA

score 10 · Answer 3 · answered Jan 09 '17 at 11:22

10

yes allows you to answer all questions from a program with y.

yes | sudo ufw enable

answered Jan 09 '17 at 11:22

Gerald Schneider

3 Answers3