$ ps auxf | grep apache2
root 151125 0.0 4.4 236536 21092 ? Ss Jun22 0:03 /usr/sbin/apache2 -k start
www-data 155918 0.0 7.5 237412 35828 ? S 00:00 0:00 \_ /usr/sbin/apache2 -k start
www-data 156031 0.0 8.9 312964 42372 ? S 00:20 0:00 \_ /usr/sbin/apache2 -k start
www-data 156035 0.0 8.8 312964 41944 ? S 00:20 0:00 \_ /usr/sbin/apache2 -k start
www-data 156168 0.0 7.6 237412 36200 ? S 00:57 0:00 \_ /usr/sbin/apache2 -k start
www-data 156169 0.0 8.9 315004 42384 ? S 00:57 0:00 \_ /usr/sbin/apache2 -k start
www-data 157209 0.0 3.0 237132 14352 ? S 01:53 0:00 \_ /usr/sbin/apache2 -k start
www-data 157210 0.0 7.7 239468 36812 ? S 01:53 0:00 \_ /usr/sbin/apache2 -k start
www-data 157822 0.0 3.0 237132 14568 ? S 02:56 0:00 \_ /usr/sbin/apache2 -k start
www-data 157823 0.0 7.6 237396 36628 ? S 02:56 0:00 \_ /usr/sbin/apache2 -k start
www-data 157936 0.0 2.9 237124 14240 ? S 03:14 0:00 \_ /usr/sbin/apache2 -k start