一般情况下,Ubuntu是可以直接通过apt install iftop来安装但是Centos会出现no package的问题此时需要先安装EPEL第三方源rpm -Uvh https://dl.fedoraproject.org/pub/epel/epel-release-latest-5.noarch.rpm ##Centos5 rpm -Uvh https://dl.fedoraproj

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