Restart Apache in Redhat/Fedora

Restart Apache:
service httpd restart
or
/etc/rc.d/init.d/httpd restart

Note: You should be logged in as root or use su

Other commands:
/etc/rc.d/init.d/httpd status
/etc/rc.d/init.d/httpd stop
/etc/rc.d/init.d/httpd start

Note: /etc/rc.d/init.d/httpd seems to be different from /usr/sbin/httpd

Location of "service":
/sbin/service

Example: /sbin/service sendmail restart