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.

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 …

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Dec 10, 2020 · The su (short for substitute or switch user) command allows you to run commands with another user's privileges, by default the root user.

Nov 8, 2025 · The su command (which stands for "Substitute User") is a fundamental Linux tool that allows you to temporarily switch your current login session to a different user account.

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 …

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 …

Nov 14, 2025 · In the realm of Linux operating systems, effective user management is crucial for maintaining system security and facilitating efficient operations. One of the most fundamental …

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.