How do I work out how powerful a given machine is? [closed]

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I'm confronted with a bewildering array of linux boxen.

How do I find out how many processors they have, how many cores, how much RAM they have, how fast their disks are, how heavily loaded they are by competing people etc, etc?

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1. If you want a static list, check for each characteristic with its own command and let your shell do the automation. That is, use /proc/cpuinfo for the CPU, /proc/meminfo for the memory, and /proc/loadavg for the computational load.
2. If you want to identify bottlenecks, have a look at atop.

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You can run the command sysinfo

This returns a few things including

1. Number of Processes
2. Memory Size

Full List here

There are also files such as /proc/cpuinfo, and /proc/meminfo that hold CPU and memory info.