I was downloading bunch of dependencies on CentOS 6.0_x86_64. Where I found this silly error.
Transaction Check Error: file /usr/share/man/man5/dhcp-eval.5.gz from install of dhcp-common-12:4.1.1-25.P1.el6_2.1.x86_64 conflicts with file from package dhclient-12:4.1.1-12.P1.el6.x86_64 file /usr/share/man/man5/dhcp-options.5.gz from install of dhcp-common-12:4.1.1-25.P1.el6_2.1.x86_64 conflicts with file from package dhclient-12:4.1.1-12.P1.el6.x86_64
But the solution was really easy.
yum update dhclient
