free命令在Ubuntu16.04之后的差别

I noticed that the  free command reporting has changed somewhere between Trusty and Xenial. Here is what `free -m’ shows on one of my Trusty computers:

Here is the equivalent on (a different) Xenial system:

The +/- buffers/cache line, which I mainly used to look at, is gone. How should I interpret the new numbers?

  • Does Mem used/free include buffers and cache or not?
  • Which numbers are the equivalent of the used and free numbers on the “+/- buffers/cache” line of the earlier version?

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