Linux Run Levels
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Run Level Description
0 Halt
1 Single-User mode
2 Multi-user mode, usually without networking support
3 Full multi-user mode with networking
4 Unused
5 Multiuser mode with networking and a graphical X window Session
6 Reboot
- To change run level use init command
init run_level
- Most normal is run level 5 for graphical linux system.
- Level 1 is used for troubleshooting or emergency purpose.
- Most linux softwares start the network softwares at run level 3.
- What aplications work at Run level is determined by system by RC script.
