yum install -y flex byacc libpcap ncurses-devel libpcap-devel
mkdir iftop cd iftop/ wget http://www.ex-parrot.com/pdw/iftop/download/iftop-1.0pre4.tar.gz tar zxvf iftop-1.0pre4.tar.gz cd iftop-1.0pre4 ./configure make && make install
原文：https://www.cnblogs.com/yunweiweb/p/11706366.html