#als bash !!!
cd $HOME/gpxtracks; gpsbabel -i gpx `ls {UA,MD,RO,HU,SK,CZ,PL,RUE,BY}.gpx 2> /dev/null|awk '{print " -f "$1}'` -x simplify,error=.33k -o gpx -F - | egrep -v -e '<time>.*</time>|<desc>.*</desc>' > $HOME/gpxtracks/Osteuropa.gpx