apache httpd をインストールした

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$ sudo apt-get update
$ sudo aptitude search apache | less
$ sudo aptitude install apache2
$ apache2 -V
$ sudo lsof -Pi:80
COMMAND  PID     USER   FD   TYPE DEVICE SIZE/OFF NODE NAME
apache2 1861     root    3u  IPv4   8384      0t0  TCP *:80 (LISTEN)
apache2 1864 www-data    3u  IPv4   8384      0t0  TCP *:80 (LISTEN)
apache2 1865 www-data    3u  IPv4   8384      0t0  TCP *:80 (LISTEN)
$ sudo ps aux | grep apache
root      1861  0.0  0.6   5428  2580 ?        Ss   08:14   0:00 /usr/sbin/apache2 -k start
www-data  1863  0.0  0.4   5200  1756 ?        S    08:14   0:00 /usr/sbin/apache2 -k start
www-data  1864  0.0  0.7 226948  2704 ?        Sl   08:14   0:00 /usr/sbin/apache2 -k start
www-data  1865  0.0  0.7 226948  2708 ?        Sl   08:14   0:00 /usr/sbin/apache2 -k start
vagrant   1952  0.0  0.1   2136   744 pts/0    S+   08:32   0:00 grep --color=auto apache
$ ifconfig |grep inet
inet addr:10.0.2.15  Bcast:10.0.2.255  Mask:255.255.255.0
inet6 addr: fe80::a00:27ff:feb5:756c/64 Scope:Link
inet addr:192.168.33.10  Bcast:192.168.33.255  Mask:255.255.255.0
inet addr:127.0.0.1  Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host

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$ egrep -e '^[ | sa-zA-Z-]+\)$' /etc/init.d/apache2
      start)
      stop)
      graceful | reload | force-reload)
      restart)
      start-htcacheclean)
      stop-htcacheclean)
      status)
 $ service apache2
  * Usage: /etc/init.d/apache2 {start|stop|restart|reload|force-reload|start-htcacheclean|stop-htcacheclean|status}