How can the amount of used RAM in the system be determined?

Determining the amount of used RAM in a system can be done in various ways depending on the operating system:

• Linux:

  • The command free -h shows total, used, and free memory.
  • The file /proc/meminfo contains detailed information about memory.
  • The commands top or htop display real-time memory usage.

• Windows:

  • The Task Manager's "Performance" tab shows memory usage.
  • The command systeminfo in the command prompt provides memory information.
  • PowerShell: Get-Process | Sort-Object WS -Descending to view process memory usage.

• macOS:

  • The command vm_stat shows virtual memory statistics.
  • top and htop are also available for monitoring.
  • The Activity Monitor provides a graphical interface.

Example for Linux:

free -h

The output will display lines with total, used, and free memory in a human-readable format.