The Unix command su, which stands for "substitute user" [1][2] (or historically "superuser" [3][4]), is used by a computer user to execute commands with the privileges of another user account.

Dec 10, 2025 · The su Linux command switches users and elevates privileges in a session. This guide shows how it works and when to use it.

Run a command with substitute user and group id, allow one user to temporarily become another user. It runs a command (often an interactive shell) with the real and effective user id, group id, and …

Oct 8, 2024 · In this how-to guide, we will explore how to effectively use the su command in Linux with practical examples.

Jun 1, 2025 · This page covers the GNU / Linux version of su. The su command, which is short for substitute user or switch user, enables the current user to act as another user during the current …

su is mostly designed for unprivileged users, the recommended solution for privileged users (e.g., scripts executed by root) is to use non-set-user-ID command runuser(1) that does not require authentication …

Nov 14, 2025 · One of the most fundamental commands related to user management is su, which stands for switch user or substitute user. This command allows a user to change their current identity …

The su (substitute user) command in Linux is used to switch to another user account within a terminal session. By default, it switches to the root user, allowing administrators to perform tasks that require …

Dec 30, 2025 · Russia pitches India the Su-57E Felon fighter with source code, tech transfer and local assembly—betting a revamped engine can reopen the arms pipeline.

Dec 17, 2024 · The su command, short for “substitute user,” is a utility in Unix and Linux-based operating systems that allows a user to switch to another user’s shell.