限制对已安装设备的访问 (Linux)

Question

The challenge is to allow access to only one directory on the mounted device for all users.

I have an external hard drive. I mount it using the command

sudo mount -o umask=0007,gid=0,uid=0 /dev/sdb1 /mnt/SAMSUNG/

I need to make one directory available for reading/writing to other users on this device. I cannot do this via sudo chmod 777 /mnt/SAMSUNG/my_directory , the command has no effect.

Is there some other way to do this? Maybe I'm doing something wrong?

Answer 1

In your sudo chmod 777 /mnt/SAMSUNG/my_directory command you give

• The user, rwx (Read, Write and Execute) permissions
• The group, rwx permissions
• And Everyone else rwx permissions

Inside of /mnt/SAMSUNG/my_directory is the thought that there should be more directories that is specific for other accounts?

If that is the case and the users are local you could do something like this:

sudo chown someuser:someuser /mnt/SAMSUNG/my_directory/someusersdir && sudo chmod 770 /mnt/SAMSUNG/my_directory/someusersdir

Answer 2

When mounting the NTFS file system ( /mnt/SAMSUNG/ ), there is no possibility of mounting a specific directory.