what is the httpd.pid file usualy used for??

HI am new to unix! So i was looking one day at the server and i saw a file called httpd.pid,:confused: i asked the administrator but he didnt wanted to tel me so if you guys can help me that will be greath/...

Thanks ,

BeoWulf

exactly what is means. httpd.pid= httpd process ID

if you cat the file it will have a small number string in it. if you did a ps -ef|grep &ltthat number&gt it will show that is the parent process id for your httpd