I can't use the ./ command in USB flash drive

Question

I recently got Linux, and wanted to run the game dwarf fortress in my USB flash drive. To run dwarf fortress on Linux you have to use ./df in the dwarf fortress folder, but when I use this command it says: bash: ./df: Permission denied. This happened a while ago when I wanted to run it in my NTFS partition, but I fixed it (I don't remember how.) I would like to fix this, thank you.

Answer 1

I figured out how to do this:

1. Install GParted and plug on your USB drive.
2. Once you opened GParted click the button on the upper-right corner, and select /dev/sdb.
3. Right click on the bar that says /dev/sdb1 and click "unmount".
4. Hover over "format to", then click ntfs.
5. Open the terminal and write sudo mkdir /media/flash.
6. Open GParted and repeat step 2, then right click the sdb1 bar and click "properties".
7. Look for the label UUID: and copy the text after that (for me it was) 2DC5421719E725AA.
8. Open the terminal again and write sudo gedit /etc/fstab, when gedit is open create a new line and type UUID=xxxxxxxxxxxxxxxx /media/flash ntfs-3g fmask=0022,dmask=0000,uid=1000,gid=1000(replace the xxxxxxxxxxxxxxxx with the UUID you copied from GParted).
9. type sudo umount /dev/stb1 then sudo mount /media/flash.

Then you're done! Thanks to the people who helped in the comments.