Permission denied: make _ sock: unable to bind to address 0.0.0.0: 80. At this time, the httpd attribute of apache needs to be adjusted accordingly: sudo chmod u+s httpd or sudochmod 4755 httpd.2 Install the configuration file in /etc/apache2 by installing apt-get install apache2; Apache can be started as a service, and by default it uses port 80. If you manually install another port 80 used by apache, you may report: "(98) Address Ready in Use: Make _ Sock: Cannot bind to address [:]: 80". Kill the apache process directly with kill -9 pid, and it will start a new process.