Network configuration

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Command line network configuration

The main Linux network configuration command is ifconfig. It is placed in /sbin directory. Using proper options, this command can be used to perform many functions like: assigning IP address, netmask, hardware ports or even activating or deactivating network cards etc. We also can check our current network configuration using this command.

As shown in above figure, there are two active components in my system. Theses are Ethernet adapter (eth0) and the loopback adapter (lo). The eth0 shows connection information for LAN, while the loopback connection helps us to make sure that the Linux is properly connected to the TCP/IP protocol.