在某些情况下，非正常关机可能造成文件系统的损坏，甚至无法正常启动系统。比较常见的系统提示是：
MOUNTING USB filesystem: OK
CHECKING ROOT FILESYSTEM
/ CONTAINS A FILE SYSTEM WITH ERRORS CHECK FORCED
/ : |===========================
ERROR READING BLOCK 2129978 (ATTEMPT TO READ BLOCK FROM FILESYSTEM
RESULTED IN HORT READ)WHILE DOING INODE SCAN
UNEXCECTED INCONSISTENCY; RUN FSCK ANUALLY
(i.e.,without -a or -p options)
……
Give root password for maintenance
(or type Control-D for normal startup):
这时可以直接输入root密码，然后回车进入修复模式，运行：
fsck /dev/hda1
fsck /dev/hda2
……
一般只需要检查Linux根分区，如果系统最终提示passed，说明检查和修复通过。重新启动即可正常进入Linux。