How to use the free command: 2-Minute Linux Tips

The video tutorial explains the 'free' command in Linux, which provides information on memory usage, including physical and swap memory. It distinguishes between free and available memory, and discusses how the command displays memory in different units like kibibytes and kilobytes. The tutorial also covers how to use the command with various options to display memory metrics in a preferred format.

What is the primary function of the free command in Linux?

• To list all running processes

• To manage user permissions

• To display the current CPU usage

• To show the amount of free and used memory

How does free memory differ from available memory in Linux?

• Free memory is always larger than available memory

• Available memory is not used at all

• Available memory includes caches and buffers that can be freed

• Free memory is used for swap space

In what unit does the free command display memory by default?

• Megabytes

• Bytes

• Kilobytes

• Kibibytes

What is the difference between kibibytes and kilobytes?

• Kibibytes are larger than kilobytes

• There is no difference

• Kibibytes are based on 1024, kilobytes on 1000

• Kibibytes are based on 1000, kilobytes on 1024

What command can you use to see all the options for displaying memory statistics with the free command?

• free -a

• free --options

• free -l

• free --help