message: add troubleshoot guide for short live connection
diff: @@ -18,5 +18,24 @@ $ flvd custom-spu register --id 5003 -p 0.0.0.0:9040 -v 0.0.0.0:9041
  $ flvd run spu -i 5003 -p 0.0.0.0:9040 -v 0.0.0.0:9041
  ```
  -# Debugging GITHUB Actions
  +# Showing TCP states in Linux
  +
  +This shows tcp states.
  +```
  +$ netstat -nat | awk '{print $6}' | sort | uniq -c | sort -r
  + 2244 TIME_WAIT
  + 90 ESTABLISHED
  + 18 LISTEN
  + 1 established)
  + 1 Foreign
  + 1 FIN_WAIT2
  + 1 FIN_WAIT1
  +```
  +
  +Note the high count of [`TIME_WAIT` ](https://serverfault.com/questions/23385/huge-amount-of-time-wait-connections-says-netstat)
  +
  +```
  +IME_WAIT is normal. It's a state after a socket has closed, used by the kernel to keep track of packets which may have got lost and turned up late to the party. A high number of TIME_WAIT connections is a symptom of getting lots of short lived connections, not nothing to worry about.
  +
  +```
  