do the following
cp nano /etc/httpd/conf/httpd.conf nano /etc/httpd/conf/httpd.org
so you have a backup just in case
then do
vi or nano just what is the best for you
nano /etc/httpd/conf/httpd.conf
do control+w to find line web4host
the replace "replace this line" between the quotes
put you own text like "powered by amiga" or sumthing like that
---
SecServerSignature "replace this line"
---
then if finished control+x
the restart the server
service httpd restart
now check your webserver and it is
"powered by amiga"
or somthing you edited