How much memory does my Linux system have?

To see the total amount of physical RAM installed, you can run sudo lshw -c memory which will show you each individual bank of RAM you have installed, as well as the total size for the System Memory.

How do I check installed memory on Linux?

Linux

1. Open the command line.
2. Type the following command: grep MemTotal /proc/meminfo.
3. You should see something similar to the following as output: MemTotal: 4194304 kB.
4. This is your total available memory.