yum能安装的软件包比较少，apt-get的资源却很丰富，推荐大家试一下：
安装对应版本的rpmforge-release
http://packages.sw.be/rpmforge-release/
执行 rpm --import http://apt.sw.be/RPM-GPG-KEY.dag.txt
rpm -K rpmforge-release-0.5.2-2.el5.rf.*.rpm
rpm -i rpmforge-release-0.5.2-2.el5.rf.*.rpm
yum install htop
然后就可以安装apt了 yum install apt
