Comprehensive and Detailed Explanation From Exact Extract:
The su (substitute user) command is used in Linux to switch to another user account, most commonly to escalate privileges by switching to the root (administrator) account. It allows administrative tasks to be performed in a terminal session.
A. runas is a Windows command for executing a program under another user's context.
B. cmcl is not a valid Linux or administrative command.
C. net user is a Windows command for managing local user accounts.
[Reference:, CompTIA A+ 220-1102 Objective 1.9: Identify common features and tools of the Linux client/desktop OS., Study Guide Section: Linux command-line tools — su, sudo, ===========================]
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