運作級别對于系統使用來說應該是一個很重要的基本概念,原來一直使用Linux,現在又用Solaris和AIX,一下模糊了,他們對runlevel的定義有些許不同,現本人搜集了哈,做個比較。
runlevel
Linux
Solaris
halt (Do NOT set initdefault to /etc/inittal "initlevel" entry)
halt
1
Single user mode
2
Multiuser, without NFS (The same as 3, if you do not have networking)
multiuser, unshare net
3
Full multiuser mode
multiuser, deafult
4
unused
5
X11
halt, power off
6
reboot (Do NOT set initdefault to this)
reboot to level 3
S
None
equal “init 1”, “boot -s”
AIX:
"AIX does not follow the System V R4 (SVR4) run level specification, with run levels from 0 to 9 available, as well as from a to c. 0 and 1 are reserved, 2 is the default normal multiuser mode and run levels from 3 to 9 are free to be defined by the administrator. Run levels from a to c allow the execution of processes in that run level without killing processes started in another."
本文轉自 xkdcc 51CTO部落格,原文連結:http://blog.51cto.com/brantc/116008,如需轉載請自行聯系原作者