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What are some good tools that I could use to monitor my processor? I know of some tools like SpeedFan and CoreTemp for Windows, but I need a Linux alternative.

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up vote 3 down vote accepted

Are you looking for real-time monitoring on-screen or logging?

There are many tools that monitor these readings and log & graph them. I use collectd with a hacked version of rrd.cgi for drawing the graphs.

For on-screen displays and other tools, search for "temp" in the package repositories (like so) will give you some options to chose from for monitoring temperatures, and there is a simple system monitor that shows you CPU use, memory use, and network IO.

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