10 Basic Linux Network and Monitoring commands

Source: Internet
Author: User
Tags nslookup

When configuring the zookeeper cluster, you need to view the native IP, enter the command hostname-i will display only the host IP,

Search below a commonly used command, busy when more knock command, in order to use the time to find!

I listed below the 10 basic Linux users should be aware of the network and monitoring commands. Network and Monitoring commands are similar to these: hostname, ping, ifconfig, Iwconfig, netstat, nslookup, traceroute, Finger, Telnet, ethtool to view the Linux server IP address , Manage server network configuration, establish network links between Linux with Telnet and Ethernet, view server information of Linux, etc. Let's look at the use of network and monitoring commands under Linux.

1. hostname

Hostname no option to display host name

hostname–d Display the domain name of the machine
hostname–f Display the full hostname and domain name
hostname–i Displays the IP address of the current machine

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2. Ping

Ping sends the packet to the user-specified address. When the package is received. The target machine sends a return packet. Ping has two main functions

1. To confirm that the network connection is unblocked.

2. The speed information used to view the connection.

If you  ping www.yahoo.com it will return its IP address. You can stop the command by CTRL + C.

3. Ifconfig

View the user network configuration. It displays the current network device configuration. This tool is extremely useful when you need to receive or send data for error lookups. The

4. Iwconfig

Iwconfig tool is similar to Ifconfig and Ethtool. is for the wireless card. You can use him to view settings for basic Wi-Fi network information, such as Ssid,channel and encryption. There are many other configurations you can also view and modify, including receive sensitivity, Rts/cts, the Shard size of the sending packet, and the retransmission mechanism of the wireless card

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5. Nslookup

Nslookup This command, when there is an IP address, can use this command to display Name, you can find all IP addresses for a given domain name. You must be connected to the Internet to use this command

Example. nslookup blogger.com

You can also use Nslookup to get the hostname from the IP or get the IP from the host name.

6. Traceroute

A handy tool. Can be used to view the IP address, hop count, and response time of the router that the packet passed through when it was submitted to the remote system or Web site. You must also link to the Internet to use this command

7. Finger

View user information. Displays the user's login name, real name, and login terminal name and login rights. This is a very old Unix command and is now rarely used for

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8. Telnet

Connect to the target host via the Telnet protocol, If the Telnet connection can be completed at either port, it represents a good connection between the two hosts.

Telnet hostname Port-telnet host name using the specified port. This is usually used to test whether the host is online or if the network is healthy.

 

9. Ethtool

Ethtool allows you to view and change many of the network card settings (not including the Wi-Fi network card). You can manage many advanced settings, including TX/RX, checksum, and wake-on-LAN capabilities. Here are some basic commands that you might be interested in:

Displays the driver information for a specific NIC, especially useful when checking for software compatibility.

 

ethtool-i

Initiates the specified behavior of an adapter, such as flashing the adapter's LEDs to help you identify the interface name in multiple adapters or interfaces:

 

ethtool-p

Display Network statistics:

 

ethtool-s

Set the connection speed of the adapter in Mbps:

 

ethtool tempo <10|100|1000>

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Ten. Netstat

Discover the most useful and common Linux commands for host connections. You can use "netstat-g" to query all multicast groups (networks) that the host subscribes to

Netstat-nap | grep Port will show the process ID of the application using that port
netstat-a or Netstat–all will display all connections that include TCP and UDP
netstat--tcp or netstat–t will display a TCP connection
netstat--udp or netstat–u will display a UDP connection
netstat-g will display all multicast networks that the host subscribes to.

10 Basic Linux Network and Monitoring commands

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