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This is purely a text based install with nothing running - am I right in thinking that the actual amout of RAM free is FREE + BUFFERS + CACHED? = 489Mb
I believe when it says free thats what it means, in your case you have 352mb of free memory. The Buffers: 4 Cached: 133 is a brake down of the Used: 150
You can also take a look at the top command or vmstat and get a idea of memory usage.
As for what is available for applications to use, you can sum up the "free" and "cached", at least.
Portions from "cached" will be handed over to applications if you're getting low on "free".
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