ruby http://unroller.rubyforge.org/ python https://docs.python.org/2/library/trace.html perl http://search.cpan.org/~mjd/Devel-Trace-0.10/Trace.pm

"set -x" enables debug-mode, for anyone else heading off to Google to investigate.

So given the script:

    #!/bin/bash
    set -x
    echo "Hello World"

The output would be:

    + echo 'Hello World!'
    Hello World!

Where the "+ ..." is the command executed. And it can be disabled with "set +x".

I agree, and refer to it as a 'call trace'. Not to be confused with stack traces, which are the same thing inside out.