# Default runlevel. The runlevels used are:

#   0 - halt (Do NOT set initdefault to this)关机

#   1 - Single user mode单用户

#   2 - Multiuser, without NFS (The same as 3, if you do not have networking)不带NFS服务的3级别

#   3 - Full multiuser mode命令行模式

#   4 - unused保留的

#   5 - X11图形化模式

#   6 - reboot (Do NOT set initdefault to this)重启