Check Free Memory in Linux

Run free -m (the -m means display the amount of memory in megabytes.)

$ free -m
             total       used       free     shared    buffers     cached
Mem:           495        482         13          0         26        362
-/+ buffers/cache:         92        402
Swap:          508          0        508

The ‘actual’ free memory is at the second line, 402 MB .To understand more about the memory in Linux, the website Linux ate my ram explains in humorous way.

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