rpm -Uvh http://dag.wieers.com/rpm/packages/apt/apt-0.5.15lorg3.2-1.el5.rf.i386.rpm
edit sourvces.list
[root@wingwu shell]# cat /etc/apt/sources.list.d/rpmforge.list rpm http://apt.sw.be redhat/el5/en/i386 dag rpm http://apt.sw.be redhat/el5/en/i386 dries repomd http://apt.sw.be redhat/el5/en/i386/rpmforge
apt-get install synaptic - Synaptic (previously known as raptor) is a graphical package management program for apt.