PLD Linux Distribution

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PLD system can be run in several runlevels: 


| Runlevel 1 | Single user mode. Used by administrator for rescue/emergency/system maintenance reasons. |
| Runlevel 2 | Multiuser level, but without Network File System |
| Runlevel 3 | Normal multiuser level. This is most commonly used runlevel.|
| Runlevel 5 | Normal multiuser level with X Window environment started by default. This is popular choice for workstations.|
| Single | Single user mode - used in emergency situations. It runs less services than runlevel 1.|There are two more runlevels: these are **Runlevel 0** and **Runlevel 6**. First one is used to bring all subsystems/processes down before system halt, second is used to accomplish similar task before system reboot. 

System boots up in default runlevel that is defined in **/etc/inittab** which is usually 3 or 5. Current runlevel can be changed with **telinit** command. For example, if system is running level 3, issuing telinit 2 brings it to level 2 (as a consequence, NFS subsystems will be stopped).  




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