UNIX command

http://www.softpanorama.org/Tools/Find/finding_world_writable_abandoned_and_other_abnormal_files.shtml
clean out core dumps and temporary files
find . \( -name a.out -o -name '*.o' -o -name 'core' \) -exec rm {} \;




find . -type f -name "*.java" | xargs tar rvf myfile.tar