I have run apt-get update && apt-get install php7.0-intl unzip.
Then I restart vps, I get an error I cannot access this website.
According to the test, I lost port 80 and 443 by apache2.
root@sv:~# netstat -nlp|grep 80
tcp 0 0 0.0.0.0:80 0.0.0.0:* LISTEN 1051/apache2
How to fix the problem?