What is multi-user Linux?

An operating system is considered “multi-user” is if allows multiple people to use a computer and not affect each other’s ‘stuff‘ (files, preferences, etc.). In Linux, multiple people can even use the computer simultaneously.

What is the meaning of multitask and multi-user in a Unix system?

What is the meaning of multitask and multi user in a Unix system? Multitasking refers to an operating system in which multiple processes, also called tasks, can execute (i.e., run) on a single computer seemingly simultaneously and without interfering with each other.