How to disable firewall in a linux system ?

Question

I suddenly pressed CTRL+Q as I am using Ubuntu Mint, but I want to get rigged of this situation.
Is there any undo shortcut for it or any possible answers.

Answer 1

You can use these comands to stop the firewall.

Execute these as a super user.

$ iptables -F 
$ ufw  status/start/stop // (use any one option)

Answer 2

There are two commands used to disable firewall for a linux system:
1. service is a command to run a System V init script. it is use to save/stop/start firewall service.
2. chkconfig is a command to use disable firewall service a boot time.