# smart search dhcpcd
bash: smart: command not found
That just means you don't have smart installed. It's a package manager like yum or apt-get.
Have you tried starting the dhcpcd service as root user?
From the command:
service dhcpcd status
If it isn't running, you could run the command:
service dhcpcd restart
You can make it start at each reboot with the command:
chkconfig --level 345 dhcpcd on