Virtual memory means the perm storage is used as temp space for RAM. The virtual memory on hard-disk is called swap space. Linux uses non-volatile storage device (example: hard-disk, flash-memory) as virtual memory. Swap is the disk space used for virtual memory purposes. (Because RAM's IO speed is a thousand times faster than hard disk, so Operating System will load disk data to RAM as cache) Linux uses RAM as cache for file data (from hard-disk). Method 3: Check free disk usage graphicallyĬhecking free disk space graphically is much easier in Ubuntu with the Disk Usage Analyzer tool.Cache is disk data in RAM. ![]() ![]() For other Linux distros, you can refer to its GitHub releases section. dust → An interesting alternative to the du command written in Rust, available for Arch Linux in the repositories. ![]()
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