Linux Running level

There 7 running level in Linux system:

• rc0.d - System Halted
• rc1.d - Single User Mode
• rc2.d - Single User Mode with Networking
• rc3.d - Multi-User Mode - boot up in text mode
• rc4.d - Not yet Defined
• rc5.d - Multi-User Mode - boot up in X Windows
• rc6.d - Shutdown & Reboot

To check which program are running at which level use command chkconfig --list.

Usefull word in IT tech doc

A

adjacent: [ә'dʒeisәnt]adj. 毗连的, 邻近的, 连接的 be adjacent to...
anomaly: [ә'nɒmәli] n, anomalous thing; irregularity
anomalous: [ә'nɒmәlәs] adj. different from what is normal; irregular

E
erratic: *[i'rætik] adj, irregular or uneven in movement,quality or behaviors; unreliable