1.让Redhat Linux启动时进入字符终端模式，需要修改/etc/inittab配置文件。
vim /etc/inittab
id:5:initdefault:
#将“id:5:initdefault:”修改为“id:3:initdefault:”
2.具体参数可以参见该文件中的注释部分：
cat /etc/inittab
# Default runlevel. The runlevels used by RHS are:
# 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)
#
