I'm replacing a poorly performing VM running CentOS6 with a real computer running CentOS7. The two commands (listed below) early on in the CentOS7 instructions appear to be invalid. I'm not super Linux literate as I know more of the BSD and Solaris worlds. Are there replacement sources for these?

Here are the ones currently failing (I've tried no more of the instructions). I suppose these could be only temporary failures:

rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt

rpm -Uvh http://pkgs.repoforge.org/rpmforge-release/rpmforge-release-0.5.3-1.el7.rf.x...

Any help is appreciated.

Bill