The 'used' memory in the output of the free command represents the amount of physical RAM that is currently being utilized by the system. This includes:
- Active Processes: Memory allocated to running applications and services.
- Cached Memory: Memory used by the kernel to cache files and data for faster access. This memory can be freed up if needed by applications.
- Buffers: Memory used for temporary storage of data while it is being transferred between two locations.
It's important to note that 'used' memory does not necessarily indicate that all of it is actively being used by applications. Some of it may be available for reuse, especially the cached and buffered memory, which can be released when applications require more RAM.
To see the 'used' memory along with other memory statistics, you can run:
free -hThis will provide a clear view of the memory usage on your system.
