View free memory in Linux

If you need to know the current memory usage on your Linux server, as well as the free or total memory, simply use the free command.

As with running any other Linux command, you will need to access your server via SSH.

Once in the server console, you can run the following command:

free -mt

This will display information about the server's RAM and SWAP memory, including the total and currently free memory, in Megabytes.

The output of this command should look similar to this image:

In these lines, you can see, in order, the total, used, and free amounts.

You can use other file size units, kilobytes, megabytes, gigabytes, and terabytes, with the following options:

free -k
free -m
free -g
free --tera