To check and repair MS-DOS file systems under Linux, you can use the "dosfsck" utility. "dosfsck" is a utility that is part of the "dosfstools" package and is used to check and repair the integrity of MS-DOS file systems on Linux systems.
Here are the steps to check and repair an MS-DOS file system using "dosfsck":
Make sure that the "dosfstools" package is installed on your Linux system. You can use the "apt-get" or "yum" command to install it if it is not already installed.
Unmount the MS-DOS file system that you want to check and repair. You can use the "umount" command to unmount the file system.
Run the "dosfsck" utility with the "-r" option to repair the file system. For example:
dosfsck -r /dev/sdXSource.www:lautturi.com
Replace "/dev/sdX" with the device name of the MS-DOS file system that you want to check and repair.
"dosfsck" will scan the file system and attempt to repair any errors or problems that it finds. If it finds any errors that cannot be automatically repaired, it will ask you if you want to repair them manually.
Once "dosfsck" has finished checking and repairing the file system, you can remount the file system using the "mount" command.
With these steps, you should be able to check and repair an MS-DOS file system under Linux using the "dosfsck" utility.
Note: "dosfsck" should only be used to check and repair MS-DOS file systems. It should not be used to check and repair other types of file systems, such as ext2, ext3, or ext4.