awk原来还能这么写

摘自：https://www.programminghunter.com/article/4059642524/

# netstat -n | awk '/^tcp/ {++y[$NF]} END {for(w in y) print w, y[w]}'

TIME_WAIT 9584
SYN_SENT 2
FIN_WAIT1 2
FIN_WAIT2 3
ESTABLISHED 28