Getting “command not found” error in bash script

Question

I have written a bash script that gets three paths based on input parameters and then then gets the imagename/filename in the path.

Something like:
I provide:

Answer 1

$PATH is a special environment variable that contains a list of directories where your shell (in this case, bash) should look in when you type a command (such as find and ls.) Just try echo $PATH in a script or in a shell to get a feeling of what it looks like (you will typically have /bin, /usr/bin and /usr/local/bin listed there, maybe more.)

As you don't really need to redefine this variable in this particular script, you should use another name than $PATH.