A situation analysis process that cannot delete a file

A situation analysis process that cannot delete a file

I am root, there is a folder, a cannot delete

1. RM-RF A
   Rm:cannot remove ' A ': Read-only file system

1 View the folder and internal file advanced properties to see if this file or the internal file for this folder has special properties set

1. Find a-exec lsattr {} \;
2. ---------------./a/a
3. ---------------./a/b
4. ---------------./a/c

The file is normal.
2 See if it is mounted as read-only.

1. Mount
2. /dev/mapper/a/A type ext3 (ro,relatime,errors=continue,barrier=1,data=journal)

Yes, I got it.

First Umount

1. umount/a
2. UMOUNT:A: Device is busy.
3. (In some cases useful info about processes
4. The device is found by lsof (8) or fuser (1))

Look who's using it.

1. #fuser A
2. #

No one's using it, Force point.

1. Fusermount-u-z/a

OK, uninstall, of course, you want to delete the exact same does not exist

A situation analysis process that cannot delete a file