Linux View server connections

Of all connections:

Netstat-na|wc-l

Number of valid connections:

Netstat-nat|grep established|wc-l

The middle parameter established represents the number of valid connections!

Groups the number of connections in various states of the server and queries to get results:

Netstat-n | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} '

1) Count 80 port connections

Netstat-nat|grep-i "|wc-l"

2) Count httpd protocol connections

Ps-ef|grep httpd|wc-l

3), the statistics are connected, the status is "established

Netstat-na|grep established|wc-l

4), find out which IP address is the most connected, sealed it.

Netstat-na|grep Established|awk {print $5}|awk-f: {print $1}|sort|uniq-c|sort-r +0n

Netstat-na|grep Syn|awk {print $5}|awk-f: {print $1}|sort|uniq-c|sort-r +0n

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1. View the current number of concurrent accesses to Apache:

Netstat-an | grep established | Wc-l

Compare the number of maxclients in httpd.conf.

2. How many processes are viewed:

PS Aux|grep httpd|wc-l

3, you can use the following parameters to view the data

Server-status?auto

#ps-ef|grep Httpd|wc-l

1388

Count the number of httpd processes, and a single request initiates a process that is used for the Apache server.

Indicates that Apache can handle 1388 concurrent requests, which Apache can automatically adjust according to the load situation.

#netstat-nat|grep-i "|wc-l"

4341

Netstat-an will print the current network link state of the system, while Grep-i "80" is used to extract connections related to port 80, wc-l the number of connections counted.

The final number returned is the total number of requests for all 80 ports currently.

#netstat-na|grep Established|wc-l

376

Netstat-an Prints the current network link state of the system, and grep established extracts information about the established connection. Then wc-l statistics.

The final number returned is the total number of established connections for all current 80 ports.

netstat-nat| | grep ESTABLISHED|WC-To see detailed records of all established connections

View the number of httpd processes (that is, the number of concurrent requests that Apache can handle in prefork mode):

Linux commands:

Ps-ef | grep httpd | Wc-l

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

Linux commands:

Netstat-n | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} '

Examples of returned results:

Last_ack 5

SYN_RECV 30

Established 1597

Fin_wait1 51

Fin_wait2 504

Time_wait 1057

Description

SYN_RECV indicates the number of requests waiting to be processed;

Established indicates the normal data transmission status;

Time_wait indicates the number of requests that have finished processing and waiting for the timeout to expire.

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View the number of connections and the current number of connections

Netstat-ant | grep $IP: 80 | Wc-l

Netstat-ant | grep $IP: 80 | grep EST | Wc-l

View IP access times

Netstat-nat|grep ": |awk ' {print $} ' |awk-f: ' {print '} ' | Sort| Uniq-c|sort-n

Linux commands:

Netstat-n | awk '/^tcp/{++s[$NF]} END {for (a in S) print A, s[a]} '

Watch "Netstat-n | awk '/^tcp/{++s[\ $NF]} END {for (a in S) print A, S[a]} ' "

$ netstat-n | awk '/^tcp/{++s[$NF]} END {for (key in S) print key, "\ T", S[key]} '

Linux View server connections