FILE

Remove all ".svn" files

find . -name ".svn" -type d -exec rm -r "{}" \;

Replace tab with four spaces (java files)

find . -name '*.java' ! -type d -exec bash -c 'expand -t 4 "$0" > /tmp/e && mv /tmp/e "$0"' {} \;

Tree view

tree /path/to/folder

Change line break

find . -name '*.java' -o -name '*.xml' | xargs dos2unix