Shell scripts on Cygwin, xargs in general

Lessons learned today : 

1. Convert the scripts and the files they operate upon to unix, using d2u.

2. For debugging, add #!/bin/bash -x at the top of the script, so that you know

which variable gets expanded to what?

3. For debugging xargs 
(i) find out whether the command being used with xargs expects single operand or multiple operands, for e.g.

find . -name expects a single operand, whereas grep -i can operate on multiple operands.

(ii) if you need to convert multiple lines of input to single line, do : 

xargs --max-args=1

(iii) use -t option with xargs to see what's going on?