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blogTitle:'嵌入式Linux之文件系统启动分析【原创】',
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author：张继飞
写在前面，这一切必须是在Linux内核挂载文件系统后。
在Linux内核中找到/init/main.c 看到如下内容：
run_init_process(\"/sbin/init\");
run_init_process(\"/etc/init\");
run_init_process(\"/bin/init\");
run_init_process(\"/bin/sh\");
这里就是执行系统的启动，当满足上面其中之一后，系统就会执行启动进程。一般通过busybox编译后的init在/sbin/下，所以通过第一条命令，下面就需要找到init，分析源码。
在busybox源码的/init/init.c中，有#define',
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