CentOS 7.0 View memory usage and view hard disk usage

In the normal use of the system, the most important three aspects of memory use the hard disk CPU load these own feel more important

The first is memory viewing

Command Free-m-m indicates the unit is m

Mainly look at the first line of mem total 3758M use 275M remaining free 3482M This shared 8M also do not know where to use ~ ....

Second row-/+ Buffers/cache

Used 151M calculation method in use (275M) used-buffers (1M)-cached (123M) = 151M

Free 3607M = no (3482M) + buffers (1M) + cached (123M) I figured it was 3606.1M does not understand ~--| |

Swap is the Swap area Windows virtual cache like ~ Online look like to set to twice times the size of memory do not know what the situation ~

And then the hard drive.

Command df-h

CentOS 7.0 View memory usage and view hard disk usage