Lightweight temperature monitoring app or command ?

Hello everyone,
I game with my Macbook Pro and therefore I like to keep an eye on my temperature.
I use to have the iStat Nano widget but it was discontinued and not available on the Apple site anymore. However I can find it on others but I wonder why it was discontinued, maybe it's not supported on Mavericks or something, or simply a choice of the author ?
Anyway I am looking for a lightweight app or command to check the temperatures. If possible free.
Any input on this would be really nice. Thanks a lot ! Cheers !

Look at iStats. It is a free, actively developed, Ruby gem, and can be run from the Terminal.
You install it into OS X from the Terminal. It will whine about hex characters not converted. Ignore these messages.
sudo gem install iStats
Should you decide that you want to uninstall it:
sudo gem uninstall iStats
You run it from the Terminal as:
iStats --help
iStats
The following output is from a 2014 MacBook Air that was just powered on. On your MBP, it will probably show two fans and their speed.

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Message was edited by: a brody

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Lightweight temperature monitoring app or command ?

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