how can i add new options of "dd command"
-u to make contents of a file uppercase and
-l to make contents of a file lowercase for example:
contents of file goes here...
and i type chmod a+x myfile
and i want the contents of file goes here... become uppercase when i add options of such as -u
dd -u if=myfile of=myfile
And contents of file become UPPERCASE all...
How can i do these in shell script help please...