khock19 wrote:
and I get no errors. But then when I type todo.sh it returns
-bash: todo.sh: command not found

You don't have problem with chmod. The problem is that the directory containing that file isn't in your 'path'. You can see this by typing the command 'echo $PATH' (without the quotes). There are three ways to deal with this: (1) Invoke that command this way: ./todo.sh . (That's what the 'Quick Start Guide' for that script tells you to do in step 5.) That tells bash to look for that command in the current directory. (2) Presuming you're positioned in the directory where that script file is, add that directory to the path using this command: export PATH=`pwd`:$PATH . You'll have to invoke that command every time you launch a new Terminal session unless you update your bash profile to include a command to set the PATH automatically. (3) Put the file todo.sh in one of the directories that's already in the PATH, such as /usr/local/bin.