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Read-only file system



你好: 我使用的ARM是am335x,SD卡启动。文件系统一直可以正常启动。但是今天不知怎么回事,文件系统起来后我想删除一个文件,但是不成功,提示:“Read-only file system”,chmod、mkdir也是如此,内核和uboot我都没变,请问这是什么原因引起的?