方法1:
# netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}'
CLOSE_WAIT 94
ESTABLISHED 145
TIME_WAIT 1
方法2:
# ss -s
Total: 503 (kernel 1775)
TCP: 341 (estab 145, closed 79, orphaned 0, synrecv 0, timewait 57/0), ports 0
Transport Total IP IPv6
* 1775 - -
RAW 1 0 1
UDP 1 1 0
TCP 262 162 100
INET 264 163 101