st: Time stolen from a virtual machine.Before Linux 2.5.41, this includes IO-wait time. us: Time spent running non-kernel code.CPU – These are percentages of total CPU time.cs: number of context switches per second.in: number of interrupts per second, including the clock.bo: Blocks sent to a block device (blocks/s).bi: Blocks received from a block device (blocks/s).buff: the amount of memory used as buffers.b: number of processes in uninterruptible sleep.r: number of processes waiting for run time.The detailed description listed below provides an explanation for each value in case you need assistance in analyzing the results. The table below lists the most useful variations of the free command. The free command has multiple options to format the output so that it better matches your requirements. The key figure being the available value as it displays how much memory is still available for running new applications. Memory reserved by the OS to allocate as buffers when process need themĮstimation of how much memory is available for starting new applications, without swapping.Ĭompared to the /proc/meminfo file, the free command provides less information. Unused memory (free= total – used – buff/cache) Memory currently in use by running processes (used= total – free – buff/cache) Use the mount point (in the Mounted on column) to specify the drive you want to check.The data represents the used/available memory and the swap memory figures in kilobytes. This displays the usage on your primary hard drive. The df command can be used to display a specific file system: df -h /dev/sda2 These are the files that prevent multiple users from changing the same file at the same time. For example, the tmpfs /run/lock is used to create lockfiles. These are used by /run and other Linux processes as temporary filesystems for running the operating system. tmpfs – You may have several of these.This is part of the Linux operating system. udev – This is a virtual directory for the /dev directory.It may be listed as /sda1, /sda0, or you may even have more than one. /dev/sda2 – This is your physical hard drive.The list of filesystems includes your physical hard drive, as well as virtual hard drives: This is also sometimes called a mount point. Mounted on – This is the directory where the file system is located.Use% – Shows the percent of the disk used.Avail – The amount of unused (free) space on the filesystem.Used – Amount of space used on each filesystem.This includes physical hard drives, logical (partitioned) drives, and virtual or temporary drives. Filesystem – This is the name of each particular drive.The df command lists several columns: Filesystem Size Used Avail Use% Mounted on

Check disk space mac command line