1.CentOS的啓動級別主要有,默認以 leve 5的方式啓動
# 0 - halt (Do NOT set initdefault to this)
# 1 - Single user mode
# 2 - Multiuser, without NFS (The same as 3, if you do not have networking)
# 3 - Full multiuser mode
# 4 - unused
# 5 - X11
# 6 - reboot (Do NOT set initdefault to this)
#
2.修改/etc/inittab文件將initdefault的級別由5修改爲3
3. 重啓CentOS系統即可