![]() We can use the free command along with the option -h, in order to check the current RAM available using a human-readable format. Just like the lsblk command, the free command can also be displayed in a human-readable format. One thing which we have to note down is, however, a lot of memory can be used by buffers or caches if our system needs additional memory for the processes, then the kernel can free up this space. ![]() Canonical recommends the following for its server edition of Ubuntu ( source ): 1 GHz CPU 512 MB RAM (system memory) 2. available: The amount of memory available on the system in kilobytes is referred to as available. Since everything on a Ubuntu 20.04 server is done by the command line, the lack of a GUI and its many dependencies means that the minimum system requirements are far lower.cache: cache is the number of memories that is used by the page cache where data can be stored first before being written to the disk.buffers: The memory that the kernel buffer use is referred to as buffers.shared: It represents the memory that is used by the tmpfs that is a virtual filesystem, and it appears to be mounted but belongs to the volatile memory. ![]() free: The term free means the amount of memory that is available on our system in kilobytes.Single click the Optimize Now button, the program can free up memory in several seconds. used: The term used means the amount of RAM currently we use on our system in kilobytes. You can learn your PC memory usage at a glance.total: The term total means the total amount of memory that is presently installed on our system in kilobytes.With the help of the free command, we can offer the following information: We can see in the above image that the output is divided into two categories: memory (the actual RAM) and swap (also known as virtual memory).
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