Apache user in Ubuntu Linux

Apache user (or web user) in Ubuntu Linux is: www-data

Normally, for any system, you can know which user is by:

$ ps aux | grep apache

root 5721 0.0 0.1 23324 1528 ? Ss Aug01 0:00 /usr/sbin/apache2 -k start
www-data 5798 0.0 0.0 23324 444 ? S Aug01 0:00 /usr/sbin/apache2 -k start
www-data 5799 0.0 0.0 23324 444 ? S Aug01 0:00 /usr/sbin/apache2 -k start
www-data 5800 0.0 0.0 23324 444 ? S Aug01 0:00 /usr/sbin/apache2 -k start
www-data 5801 0.0 0.0 23324 444 ? S Aug01 0:00 /usr/sbin/apache2 -k start
www-data 5802 0.0 0.0 23324 444 ? S Aug01 0:00 /usr/sbin/apache2 -k start
unsigned_nerd 15968 0.0 0.0 3008 776 pts/1 R+ 01:37 0:00 grep apache

You see? It is "www-data" in Ubuntu Linux...

What is it in your system?