SSH Linux Free Memory
When you run a VPS or dedicated server, chances are memory usage is your biggest concern. Luckily, you can always login to your server with SSH and see the details to calculate free memory that is available.
Calculating Free Memory
To calculate free memory,
1) Login to Linux server with SSH with root
root@VPS [~]# free -m
3) Click enter on pc
4) You will receive 2 rows. The first row show total, used and free memory.
The second shows +/- buffers/cache used and free memory.
The second more is the most important. That free memory is the value you are after. You do not want to exhaust that memory or you need to reboot the server or add more from your web host.