Top is a UNIX program that shows system usage in real time.

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Cpu usage in the output of top

I am looking at the output of top. top - 16:11:19 up 31 days, 2:37, 10 users, load average: 17.01, 16.99, 17.00 Tasks: 470 total, 18 running, 452 sleeping, 0 stopped, 0 zombie ...
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average load and total %CPU in top

I thought the average load by uptime and the summation of %CPU of all running processes in top (#9 column) should agree. But it seems not true. Here is my little experiments: On one server: $ top -b ...
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Memory percentage in top (linux)

Just wondering (1) is the memory percentage in top for a process is relative to memory or relative to memory+swap? (2) if it is the former, how can I get the latter? Vice versa. (3) To determine ...
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Where does the command “top” get its information from in linux?

Which files does the linux command "top" read from in order to build its table of data? Specifically, I'd like to be able to find the data for the "command" column based off of a PID.
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What is the colorized version of the Linux “top” program?

I didn't know "top" had a nicer colorized version like this. What is the command? Does anyone recognize this?