In case you want to determine webserver and OS information for a given site use curl or wget. Some sites will reveal a lot of information some is not so informative.

# curl -I http://<domain>

# wget --server-response --spider http://<domain>

https can be used as well

If curl or wget is not installed telnet can be used as well

# telnet <domain> 80 (or 443 is https is used)

Type

HEAD / HTTP/1.0

Hit enter twice

Change your servers php.ini expose php parameter to:

expose_php Off

Change/add following httpd.conf parameters:

ServerTokens Prod

This will only reveal Apache in return.

awk '{print $1}' accept.log | sort  | uniq -c | sort -n

awk '{print $4}' accept.log | cut -d: -f1 | uniq -c

grep "22/Nov" accept.log | cut -d[ -f2 | cut -d] -f1 | awk -F: '{print $2":00"}' | sort -n | uniq -c