title: XAMPP Another web server is already running. with attemps
body: <p>I install XAMPP with Ubuntu 18.04 and got the </p>
  
  <pre><code>XAMPP:  Another web server is already running.
  </code></pre>
  
  <p>and cannot run the Apache server.</p>
  
  <p>After some research I tried </p>
  
  <ol>
  <li><p>restart  all of the process again with xampp restart</p></li>
  <li><p><code>sudo /etc/init.d/apache2 stop</code> and it did say that it's stopped</p></li>
  </ol>
  
  <p>I have no Virtual Box installed</p>
  
  <p>[edited]
  after the suggestion of <code>netstat -tuplen</code>
  here is what I got</p>
  
  <pre><code>tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      121        23365      1031/mysqld         
  tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN      0          23258      1014/nginx: master  
  tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      101        20354      561/systemd-resolve 
  tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      0          22965      780/cupsd           
  tcp6       0      0 :::80                   :::*                    LISTEN      0          23259      1014/nginx: master  
  tcp6       0      0 ::1:631                 :::*                    LISTEN      0          22964      780/cupsd           
  udp    41472      0 127.0.0.53:53           0.0.0.0:*                           101        20353      561/systemd-resolve 
  udp        0      0 0.0.0.0:68              0.0.0.0:*                           0          28781      1301/dhclient       
  udp        0      0 0.0.0.0:41584           0.0.0.0:*                           115        25049      795/avahi-daemon: r 
  udp        0      0 0.0.0.0:631             0.0.0.0:*                           0          24055      939/cups-browsed    
  udp    52602      0 0.0.0.0:5353            0.0.0.0:*                           115        25047      795/avahi-daemon: r 
  udp6       0      0 :::53734                :::*                                115        25050      795/avahi-daemon: r 
  udp6   29223      0 :::5353                 :::*                                115        25048      795/avahi-daemon: r 
  </code></pre>