What Is a Runlevel?

October 11, 2022

A runlevel is one of the seven pre-defined modes a VPS, dedicated, or Unix-based system can boot and operate in. Every runlevel represents a different system configuration and allows access to a different set of system processes.

The seven runlevels are:

0 – System halt (the system can be safely shut down)
1 – Single user mode
2 – Multi-user mode (no networking)
3 – Multi-user mode (command line interface instead of graphical user interface)
4 – User-definable
5 – Multi-user mode (with networking)
6 – Reboot/restart

Anastazija is an experienced content writer with knowledge and passion for cloud computing, information technology, and online security. At phoenixNAP, she focuses on answering burning questions about ensuring data robustness and security for all participants in the digital landscape.