统计:各种连接的数量
ss -nat | awk '{++S[$1]} END {for(a in S) print a, S[a]}'
netstat -nat | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
ss -nat | awk '{++S[$1]} END {for(a in S) print a, S[a]}'
netstat -nat | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'