Linux fsck命令：检查并修复Linux文件系统

Linux fsck（英文全拼：file system check）命令用于检查与修复Linux文件系统，可以同时检查一个或多个Linux文件系统。

如果系统掉电或磁盘发生问题，可利用fsck命令对文件系统进行检查。

语法格式：fsck [参数] [文件系统]

常用参数：

参考实例

修复坏的分区文件系统：

[root@bunian ~]# fsck -t ext3 -r /usr/local
fsck from util-linux 2.32.1
e2fsck 1.45.6 (20-Mar-2020)
fsck.ext3: Is a directory while trying to open /usr/local

The superblock could not be read or does not describe a valid ext2/ext3/ext4
filesystem.  If the device is valid and it really contains an ext2/ext3/ext4
filesystem (and not swap or ufs or something else), then the superblock
is corrupt, and you might try running e2fsck with an alternate superblock:
    e2fsck -b 8193 <device>
 or
    e2fsck -b 32768 <device>

/usr/local: status 8, rss 2956, real 0.037328, user 0.001944, sys 0.000000

显示fsck系统安装的版本号：

[root@bunian ~]# fsck --version 
fsck from util-linux 2.32.1

检查msdos文件系统的 /dev/hdb 是否正常，如果有异常便自动修复 :

[root@bunian ~]# fsck -t msdos -a /dev/hdb