Hi, I have installed Mandrake Linux on my machine, the first day dhcpcd worked, but now when I write dhcpcd example dhcpcd -k I get this message on my screen: DHCPCD is not running
How can I activate/run dhcpcd

Was dhcpcd a package that came with the Mandrake setup? Try and run
setup as root and make sure it is set to start.

http://www.phystech.com/download/dhcpcd_man.html