How to open port 8888

# Install firewalld sudo apt install firewalld # Check whether port 8888 is open or not ```ssh ubuntu@music:~$ sudo firewall-cmd --query-port=8888/tcp no ``` # Open port ```sh ubuntu@music:~$ sudo firewall-cmd --add-port=8888/tcp --permanent success ``` # Reload firewall ```ssh ubuntu@music:~$ sudo firewall-cmd --reload success ```