Linux Networking Commands And Configurations

Networking Commands

Here are the basic networking command you should know to monitor your network configuration and status.

Type following command into your terminal.

$ ping <ip addr> 

   To check response of icmp echo request to host machine.

   ping -t <ip addr>       (Continuous ping to network)
   ping -s 32 <ip addr>  (for sending specific bytes of data)
   ping -c 5 <ip addr>    (for sending no. of packets to destination)

$ mtr <ip addr>

   To perform combine functionality of 'traceroute' and 'ping' tool.
By applying this command you can get additional information about state, connection and percentage of lost packets of all intermediate hosts.

   mtr <ip addr>
   mtr  --report -c 4 <ip addr> (will run 4 no. of cycles in report mode of mtr)

$ netstat

   To display connection and routing table information.Here are some commands.

   netstat -a  (Connection info)
   netstat -r  ( routing table)

$ ifconfig

   To display available interfaces on machine and add or remove network to it.

   ifconfig    (tells available interfaces on comp.)
   ifconfig eth0 add <ip addr> <mask>   (To add new network to eth0)

Configuration Files

To edit network configuration or to check connection infromation you can see these files.

/etc/network/interfaces---Network configuration file.

/etc/resolv.conf---DNS configuration.

/etc/hostname---Hostname configuration.

/etc/hosts---Local DNS.