linux: repair filesystem
第一种情况：非正常关机引起的磁盘分区问题 不能正常进入系统
大家好~！
麻烦大家教教我如下问题一般是如何引起和应该怎么样解决呢？
Finding module dependencies; [OK]
modprobe:modprobe:can't locate module block-major-3
fsck.ext3Possibly non-existent or swap device?
:NO such device or address while trying to open /dev/hdb1
/boot: clena, 41/26104 files. 12679/104391 blocks
[FAILED]
*** AN error occurred during the file system check
*** Dropping you to a shell; the systm will reboot
*** when you leave the shell
Give root password for maintenance
(or type Control-D to continue):
Login incorrect.
(Repair filesystem) 1 #
上次非正常关机引起的，用fsck /dev/hdaX后reboot进入，或只用fsck来修复，只管y回车
第二种情况：由于/etc/fstab文件编辑错误 而引起的不能正常进入系统
解决方法就是修改/etc/fstab文件成原来正常格式 删除错误的或者是不存在的挂载目录
操作：根据提示进入修复模式 Login incorrect.
(Repair filesystem) 1 # vim /etc/fstab
但是修复模式下（read-only system） 文件是被保护的不能修改 运行下面命令 把系统文件权限改成可读写（rw）
（Repair filesystem) 1 # mount -o remount,rw /
使根目录可写．即可以修复/etc/fstab文件，使之可写．然后就可以vi修改了
保存 wq
（Repair filesystem) 1 #reboot
搞定！！！ RHLE正常界面又出来了。
My Operation System is Red Hat 9.0. when i reboot my system, the system show me :
mounting proc filesystem: dup2:Bad file descriptor
grep: /proc /mounts: No such file or directory
...
...
/etc/rc.d/rc.sysinit: line 176:/dev/null: Read-only file system
...
checking root filesystem
dup2: Bad file descriptor
***An error occurred during the file system check
...
give root password for maintenance
(or type control-D to continue):
into then, we are input root passwd, then system showing:
repair filesystem 1#
we can operation many command as usual operation linux system.
in order repair my system, input under command:
repair filesystem 1# mount -n -o remount, rw /dev/hda3
repair filesystem 2#rm -rf /dev/null
repair filesystem 3#mknod -m 666 /dev/null c 1 3
repair filesystem 4#reboot
then system will reboot, and filesystem will be repaired. your system is OK.
parse:
/dev/hda3 is your system's root filesystem.
i don't operation if dno't input mount command, your OS do OK.