ifconfig Command Does Not Show IPv4 Address

ifconfig command does not show IP address on my Linux based laptop computer. How do I fix this problem?

You need to configure your networking. Here are some tips to solve this problem under Linux.

Find out if eth0/wlan0 detected or not...

Is your network card detected by Linux? Run ifconfig command and make sure you can see eth0 or wlan0 as an interface:
ifconfig
Also run the lspci command to list your current wireless and ethernet devices:
lspci
If you do not see your card. You need to install the network card driver.

GUI Tools

Networking on Linux can be painful, especially in comparison to other operating systems. You can use NetworkManager to configure your wireless or ethernet cards. NetworkManager is configured through graphical interfaces, which are available for GNOME and KDE.

How Do I Use NetworkManager?

You will see applet (computer icon) in the notification area / system tray. Left-click this icon to present the nm-applet pop-up menu. You can see neighboring wireless networks with a broadcasted SSID. You can right click and edit the settings.

A note about the Internet connection...

Is your Internet connection working? Most router will give you an IP address when connected to the Internet via DHCP server. Make sure eth0 or wlan is configured to obtain address automatically using DHCP.