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# **fsck**
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## 说明
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**fsck命令** 被用于检查并且试图修复文件系统中的错误。当文件系统发生错误四化，可用fsck指令尝试加以修复
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## 选项
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```markdown
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-a：自动修复文件系统，不询问任何问题
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-A：依照/etc/fstab配置文件的内容，检查文件内所列的全部文件系统
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-N：不执行指令，仅列出实际执行会进行的动作
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-P：当搭配"-A"参数使用时，则会同时检查所有的文件系统
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-r：采用互动模式，在执行修复时询问问题，让用户得以确认并决定处理方式
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-R：当搭配"-A"参数使用时，则会略过/目录的文件系统不予检查
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-s：依序执行检查作业，而非同时执行
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-t<文件系统类型>：指定要检查的文件系统类型
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-T：执行fsck指令时，不显示标题信息
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-V：显示指令执行过程
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fsck返回的退出代码是以下条件的总和:
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0 No errors
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1 Filesystem errors corrected
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2 System should be rebooted
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4 Filesystem errors left uncorrected
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8 Operational error
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16 Usage or syntax error
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32 Checking canceled by user request
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128 Shared-library error
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```
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## 实例
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```bash
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fsck -y /dev/hda2 # linux不正常关机可能会导致文件损坏，例如用fsck修复/dev/hda2
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```
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