``` netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' ``` <p> </p> ``` vim /etc/sysctl.conf ``` <p> </p> ``` net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 1 ``` <p> </p>