Which of the following outputs comes from the command free?
1.8M /tmp total used free shared buff/cache available Mem: 16123128 12565680 2011624 412128 1545824 7180416
The command `free` is used to display the amount of free and used memory in the system, along with buffers and cache. The output shows detailed information about memory usage, including total, used, and available memory, which is characteristic of the `free` command's functionality.
This output is typically generated by the `uptime` command, which provides information about how long the system has been running, the number of users logged in, and the system load averages. It does not pertain to memory usage, making it incorrect for the `free` command.
This output is associated with the `mpstat` command, which presents CPU usage statistics. It details the average CPU utilization percentages across various categories, but does not provide any memory-related information, thus disqualifying it as a valid output of the `free` command.
This output is produced by the `df` command, which displays disk space usage for filesystems. It includes details about sizes, used space, available space, and mounting points, but it is not related to memory usage, making it an incorrect choice for the `free` command output.
The `free` command is designed to provide insights into the system's memory usage, including total, used, and available memory. Among the choices given, only the output displaying memory statistics (1.8M /tmp total used free shared buff/cache available Mem: 16123128 12565680 2011624 412128 1545824 7180416) fits this criterion, while the others pertain to other system metrics such as uptime, CPU usage, and disk space.
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