The free command is the most simple and easy to use command to check memory usage on linux. Here is a quick example. The m option displays all data in MBs. The total os 7976 MB is the total amount of RAM installed on the system, that is 8GB.The used column shows the amount of RAM that has been used by linux, in this case around 6.4 GB. The output is pretty self explanatory. The catch over here is the cached and buffers column. The second line tells that 4.6 GB is free.he total os 7976 MB is the total amount of RAM installed on the system, that is 8GB. The used column shows the amount of RAM that has been used by linux, in this case around 6.4 GB. The output is pretty self explanatory. The catch over here is the cached and buffers column. The second line tells that 4.6 GB is free.
1 Compound (enclosure) , a cluster of buildings having a shared purpose, usually inside a fence or wall. 2  Compound (fortification) , a version of the above fortified with defensive structures. 3  Compound bow, a type of bow for archery. 4  Compound (linguistics) , a word that consists of more than one radical element.
An element is any substance that consists of only one type of atom, that is all atoms have the same number of protons. A compound is a substance that has two or more element â¦ s chemically bonded together either covalently or ionically in a fixed ratio.n element is a pure substance composed of 1 type of atom. Meaning all the atoms have the same number of protons. A compound is a pure substance composed of 2 or more types â¦ of atom chemically bonded together.