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I have mounted a external drive at:
# mkdir /mnt/external
and subsequently:
mkdir -p /mnt/external
mount /dev/sdb1 /mnt/external
Now only the root-user has access to write to these folders.
linux-wyee:/home/martin # dir /mnt
drwxr-xr-x 2 root root 4096 13. Dez 22:01 external
How to change this - how to change that all can write to the external drive. I need to change the permissions within the terminal.
chmod 777 /dev/sdb1 /mnt/external or something alike -
986
The command chmod -R 777 / makes every single file on the system under / (root) have rwxrwxrwx permissions. This is equivalent to allowing ALL users read/write/execute permissions.
Navigate to the Security tab, in the middle of the Properties window; you'll see 'To change permissions, click Edit'. This is where you can change read/write permission on the target disk. So, click "Edit", and the Security window immediately pops out.
Select the drive letter for the external HDD and right-click on it to choose Properties. Choose the Security tab from the Properties window. After that, click on the Edit button to make changes in the permissions. On the next screen, you will a section called Permissions for Authenticated Users.
When you perform chmod 755 filename command you allow everyone to read and execute the file, the owner is allowed to write to the file as well. So, there should be no permission to everyone else other than the owner to write to the file, 755 permission is required.
Try this first,
umount /dev/sdb1
chmod -R 0777 /mnt/external
then mount with
mount /dev/sdb1 /mnt/external
or try
chmod -R 0777 /mnt/external
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