Superuser 'permission denied'

I wish to run a script in the root directory. The script is /opt/poky/1.6/xx

If I log in as a superuser in Ubuntu 14.04 using sudo -i and my own password, I can see this file using ls /opt/poky/1.6/.

When I try to run this file in user mode with sudo /opt/poky/1.6/xx it asks me for a sudo password. I use my normal machine password and it gives the message 'command not found'

When I go back to superuser mode using sudo -i and run the file as /opt/poky/1.6/xx it gives the message 'Permission denied'

If I change to the directory in superuser mode using cd /opt/poky/1.6/ and then display the file using vi xx I have no problems viewing the file.

How can I overcome the problem of 'Permission denied' or 'command not found' in superuser mode?

1 Answer

The error "Permission Denied" often means that you do not have execute permission on the file. To fix that, run chmod +x <filename> as the root user. Now, the root user can run the file using ./<filename>.

Command Not Found can mean many different things. First off, you need to have the ./ or an absolute path for running files not in your $PATH variable. (i.e../test.sh or /home/user/bin/test.sh).

However, Command Not Found can also mean that a library is missing. Check that you have all the required dependancies to run that file.