Problem in connecting Wifi in Ubuntu 14.04 LTS after upgrading?

Hi all,

Recently i upgraded my Operating System to Ubuntu 14.04 LTS from ubuntu 12.04 LTS  in my Dell Vostro laptop. But after upgrade has finished i found my wifi connection not working in Ubuntu 14.04.

I checked #ifconfig -a, but wlan0 is not listed in the list of interfaces.

After some research i found the solution.

Here i'm providing some commands to troubleshoot your wlan interface.

> Check all the wireless devices available in the system and their state (block or unblock)

Some Interesting Facts about Linux Kernel

Here i collected some interesting facts about the Linux Kernel.

• Linus Torvalds Developed the linux when he was a student (21 years old) at the University of Helsinki in 1991

• In the beginning Torvals wanted to call the kernel he developed Freax (Combination of free, freak, and X to indicate Unix like system)

• Linux Kernel is written in the C Programming language
• Google's Android, Nokia's Maemo are built on top of the Linux Kernel

• Only 2% of the present Linux kernel has been written by Linus Torvalds
• Torvalds created Linux based on GNU GPL (General Public Lisense)