Shulou(Shulou.com)06/01 Report--

Linux itself provides many tools for network testing, network troubleshooting, and network state analysis. Let's take a look at some of the more commonly used tools.

1. Ping command

The ping command also tests network connectivity using the ICMP protocol.

Command format: ping [option] IP

Common options:

-c #: specify the number of messages

-W timeout: the timeout for waiting for a response message.

II. Traceroute command

The traceroute command is used to trace the routing nodes that pass through the destination.

Command format: traceroute HOST | IP

3. Mtr command

The function of the mtr command is similar to that of the traceroute command, but displays node information dynamically.

Command format: mtr HOST | IP

4. Netstat command

Used to display the network connection status.

Command format: netstat [options]

Common options:

-t:TCP protocol

-u:UDP protocol

-n: displays the address in numeric format

-l:listen, showing connections in the monitored state

-tan:TCP all statu

-p: displays the process program name and process number in the session

-r: displays the routing table

Common combination options:-tunpl

5. Ethtool command

Used to display attribute information for network devices.

Command format: ethtool [options] device name

-S: displays statistics for network interfaces

VI. Ss command

The ss command works the same as the netstat command, but the ss command can also specify the connection status as a filter condition.

Command format: ss [options]

Common options:

-t:tcp

-n:udp

-p:process

-l:listening

-a:all

-e: extended information

-m: socket-related memory usage information

-o state {established,listening,fin_wait_1,fin_wait_2}'(dport= or sport=) 'shows only connections in a specified state, and filter criteria can also be specified

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