The "su" command is a powerful command line tool in Unix-like operating systems, including Linux and macOS. "su" stands for "Switch User" or "Super User" and allows users to switch to a different user account, including the root (admin) account, on the same terminal session.
- The "su" command is typically used for administrative tasks that require elevated privileges.
- It is often used when you need to perform system maintenance or make changes that are restricted to system administrators.
- By default, the "su" command switches to the root user account, providing full access to all files and commands on the system.
- However, it can also be used to switch to other user accounts if you have the necessary permissions.
- When running "su" without any arguments, it prompts for the password of the user you wish to switch to.
- Once the correct password is entered, the terminal prompt changes to reflect the switched user account.
- The "su" command is commonly used in combination with other commands to perform administrative tasks, such as installing software or modifying system configurations.
- It is essential to exercise caution when using "su" as any mistakes or unintended commands executed with root privileges can have severe consequences on the system's stability and security.
- Some systems may restrict the usage of the "su" command, allowing only specific users or groups access to switch to the root account.
- Alternatives to "su" include "sudo" (Superuser Do), which provides a more granular approach to granting temporary administrative privileges to users, and "su -", which provides a more complete environment change when switching users.