By the end of this article you should be able to answer the following questions:
$ free -m
If you want to see how much ram your machine has installed and how much of it is being used, then you need to use the "free" command:
$ free -m total used free shared buff/cache available Mem: 993 266 440 6 286 573 Swap: 2047 0 2047
We used the -m option to output the info in megabytes.
In this case we have about 1gb of ram installed, of which 266MB is being used and 440MB is free.