http://www.cyrius.com/debian/gps/bt-q1000x/ http://www.gpsbabel.org/htmldoc-development/fmt_mtk.html http://www.gpsvisualizer.com/

I have many files with .abc extension and want to change them to .edefg I have a root folder with many sub-folders, so the solution should work -r recursively. find /the/path -depth -name "*.abc" -exec sh -c 'mv "$1" "${1%.abc}.edefg"' _ {} \;