How to activate an inactive UFW on Ubuntu 20.04 step-by-step instructions

  1.  First, check your current UFW status: 
    $ sudo ufw status
Status: inactive
  2. Activate UFW: 
    $ sudo ufw enable
Firewall is active and enabled on system startup
  3. (optional) Check UFW status: 
    $ sudo ufw status
Status: active

    Once the UFW is enabled, these settings should persist after the system reboots.

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