Linux Run Levels

• Runlevels are being updated/replaced by UpStart, but are still valid (so far)

• Default Runlevel definition for most distros

• Runlevel 0 - Halt
• Runlevel 1 - Single user mode
• Runlevel 2 - Multi-user mode, without NFS
• Runlevel 3 - Full multi-user mode (no GUI)
• Runlevel 4 - undefined
• Runlevel 5 - Full multi-user mode (GUI)
• Runlevel 6 - Reboot
• Runlevel 7 - undefined
• Runlevel 8 - undefined
• Runlevel 9 - undefined