Cat hello.txt permission denied

Navigate to the folder where your hello.txt file is and type ls -l. This will bring up a list of the files in that folder with a list of your permissions. It's read like "rwx rwx rwx" where the first triplet of rwx are your permissions (assuming you own that file).

Because cat hello.txt is trying to read the file you will need to have the r permission set.

I found the problem. it was listed under a different user, but thanks though!

In the "Permissions" training, we changed the owner to "mike" instead of "treehouse", so once we get to the "Find and Grep" training, our permission gets denied.

To reset the owner to "treehouse", type in the command line:

sudo chown treehouse hello.txt