单项选择题
redhat系统中,修改()文件可以更改系统启动时的默认运行级别
A./etc/runlevel
B./etc/init.d/boot
C./etc/inittab
D./etc/securetty
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单项选择题
A./etc/runlevel
B./etc/init.d/boot
C./etc/inittab
D./etc/securetty
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