How do I get a full path to a program in linux?

Question

I need to get to the full path of mono because it seems things are messing up when I just use the command "mono" through cronjobs

I have this: /usr/etc/mono

But I also have this: /usr/local/src/mono-2.10.2/mono

I'm not sure what i'm suppose to link it to. Any ideas please?

Answer 1

Look at the output of

$ which mono

Answer 2

Most likely /usr/etc/mono, as the other path looks like a source tree.