いつも忘れるのでメモしておきます。
TCPのStateとコネクション数を出力する。
# 単発
$ netstat -nat | awk '{print $6}' | sort | uniq -c
1 ESTABLISHED
1 Foreign
12 LISTEN
5 TIME_WAIT
# 定期的に確認する
$ watch -n 10 "netstat -nat | awk '{print \$6}' | sort | uniq -c"
More than 5 years have passed since last update.
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