How to find Memory (RAM) available on a Linux Server

To find memory, use the free command.

free -m

Will show memory in MB.

The following is free -m on a server with 8 GB RAM.

boby@sok-01:~$ free -m
              total        used        free      shared  buff/cache   available
Mem:           7949        5560         715         137        1673        1984
Swap:          9536        2660        6876
boby@sok-01:~$ 

To display memory usage in a human friendly way, use

free -h

Example

boby@sok-01:~$ free -h
              total        used        free      shared  buff/cache   available
Mem:          7.8Gi       5.4Gi       686Mi       143Mi       1.6Gi       1.9Gi
Swap:         9.3Gi       2.6Gi       6.7Gi
boby@sok-01:~$