查看tcp连接数（Check the TCP connection number）.doc

查看tcp连接数（Check the TCP connection number） Check the number of TCP connections in Linux See which IP connections are connected to the machine Netstat -an Check the number of TCP connections 1) statistics 80 port connections Netstat - NAT | grep - I 80 | wc - l 2) statistics HTTPD protocol connection number Ps - ef | grep HTTPD | wc -l 3) the state is established Netstat na | grep ESTABLISHED | wc -l 4) find out which IP address is the most connected, and seal it. Netstat - na | grep ESTABLISHED | awk {print $5} | awk - F: {print $1} | sort | sort - c | sort - r + 0n Netstat - na | grep SYN | awk {print $5} | awk - F: {print $1} | sort | sort - c | sort - r + 0n -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 1. Check the current concurrent access number of apache: Netstat - an | grep ESTABLISHED | wc - l Compare the number of MaxClients in httpd.conf. 2. Check the number of processes: Ps aux | grep HTTPD | wc -l 3. You can view the data using the following parameters Server - the status? auto # ps - ef | grep HTTPD | wc -l 1388 Count the number of HTTPD processes, and even a request will start a process, using the Apache server. It says that Apache can handle 1388 concurrent requests, which Apache can adjust automatically depending on the load. # netstat - NAT | grep - I 80 | wc - l 4341 Netstat - an will print the current network link status of the system, while grep-i 80 is used to extract the connection to port 80, and wc - l makes the connection count. The final number returned is the total number of requests for all 80 ports. # netstat - na | grep ESTABLISHED | wc -l 376 Netstat -an will print the current network link state, while grep ESTABLISHED extracts the information that has been ESTABLISHED. Then wc - l statistics. The final num