CentOS7 has been out for a few years. I personally still use the 6 series. I mainly feel that the operations of these commands have changed too much, such as the firewall view and switch. It is always a habit to memorize the 6 series commands. 8 is not far away and you cannot hold on to 6 all the time. Now I will record the firewall related commands to facilitate my own search.
View, open and close CentOS7 firewall
CentOS7 has been out for a few years. I personally still use the 6 series. I mainly feel that the operations of these commands have changed too much, such as the firewall view and switch. It is always a habit to memorize the 6 series commands. 8 is not far away and you cannot hold on to 6 all the time. Now I will record the firewall related commands to facilitate my own search.