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.

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.

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 …

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 …

Nov 14, 2025 · The su command allows a user to switch to another user account on a Linux system. When you run su, you can either switch to the root user (the superuser with full …

Jul 23, 2025 · As a new Linux user, you may always face confusion regarding the difference between `su` command and `su -` command. In Linux, the `su` command is used to switch to …

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.

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

Apr 26, 2025 · The `su` command stands for “substitute user” and it is used to switch users in a Linux environment. In order to use this command, you must have root access.

5 days ago · Russia’s Su-57 just flew with its new Izdeliye 177 engine. Can this long-delayed “fifth-gen” fighter finally live up to the hype in Ukraine and beyond?