View the number of concurrent requests for HTTP and their TCP connection status

2. Statistics of connection data for port 80

   Netstat-nat | Grep-i "80" | Wc-l

4. Count HTTPD Protocol Connections

   Ps-ef | grep httpd | Wc-l

6. Statistics of connected, state-establish

   Netstat-na | Greo Establish | Wc-l

8. Find out which IP connection is the most, and seal it off

   Netstat-na | grep Establish | awk {print $} | Awk-f:{print $1}| Sort | uniq-c | Sort-r +on

10. View the current number of concurrent accesses to Apache

    Netstat-na | grep Establis | Wc-l

12. See how many processes are there

    Ps-aux | grep httpd | Wc-l

14. To view the number of concurrent requests for Apache and its TCP connection status

    Netstat-nt | awk ' {++s[$NF]}end{for (A in S) print A,s[a]} '

    SYN_RECV indicates the number of requests that are waiting to be processed; established indicates normal data transfer status; Time_wait indicates the number of requests that have been processed, waiting for the time-out to complete.
    Status: Description
    
    CLOSED: No connection is active or in progress
    
    LISTEN: The server is waiting to enter the call
    
    SYN_RECV: A connection request has arrived, waiting for confirmation
    
    Syn_sent: Application has started, open a connection
    
    Established: Normal data transfer status
    
    FIN_WAIT1: Application says it's done
    
    Fin_wait2: The other side has agreed to release
    
    Itmed_wait: Waiting for all packets to die
    
    CLOSING: Both sides try to close simultaneously
    
    Time_wait: The other side has initialized a release
    
    Last_ack: Waiting for all packets to die

View the number of concurrent requests for HTTP and their TCP connection status