Editing Runlevel (section)

=== Linux Standard Base specification ===
Systems conforming to the [[Linux Standard Base]] (LSB) need not provide the exact run levels given here or give them the meanings described here, and may map any level described here to a different level which provides the equivalent functionality.<ref>
{{cite web | url = http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/runlevels.html | title = Chapter 20. System Initialization 20.5. Run Levels 
| work = [[Linux Standard Base]] Core Specification 4.1 | year = 2011 | access-date = 2011-04-21}}
</ref>

{| class="wikitable"
|+LSB 4.1.0
|-
!ID
!Name
!Description
|-
|'''0'''
|Off
|Turns off the device.
|-
|'''1'''
|Single-user mode
|Mode for administrative tasks.<ref>{{cite web | url = http://refspecs.linuxfoundation.org/LSB_4.1.0/LSB-Core-generic/LSB-Core-generic/shutdown.html | title = Chapter 15. Commands and Utilities 15.2. Command Behavior | work = Linux Standard Base Core Specification 4.1 | year = 2011 | access-date = 2011-04-21}}</ref>{{Efn|The additional behavior of runlevel 1 varies greatly.  All distributions provide at least one virtual terminal.  Some distributions start a login shell as the [[superuser]]; some require correctly entering the superuser's password; others provide a login prompt, allowing access to any registered user.}}
|-
|'''2'''
|Multi-user mode
|Does not configure network interfaces and does not export networks services.{{Efn|In some cases, runlevels 2 and 3 function identically, offering a multi-user mode with networking.}}
|-
|'''3'''
|Multi-user mode with networking
|Starts the system normally.{{ref|behavior_of_runlevel_23}}
|-
|'''4'''
|Not used/user-definable
|For special purposes.
|-
|'''5'''
|Full mode
|Same as runlevel 3 + [[X display manager (program type)|display manager]].
|-
|'''6'''
|Reboot
|Reboots the device.
|}