centos iftop 安装
yum install -y gcc flex byacc libpcap ncurses-devel libpcap-devel wget http://www.ex-parrot.com/~pdw/iftop/download/iftop-0.17.tar.gz tar zxvf iftop-0.17.tar.gz cd iftop-0.17 ./configure make && make install
