sudo apt-get remove linux-image-3.13.0-4*

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*update: It worked!!!
In a hurry to remove multiple old linux kernel versions from my system I popped in above command. After a while I came back to the terminal to find all my kernels were un-installed!!! :J
Well, thankfully I noticed what has happened and right away reinstalled the latest one with this command:
sudo apt-get install linux-image-3.13.0-62-generic.
Haven't rebooted yet. Let see!

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