find . -type f ! -size 0 \( -name '*.[chm]' -o -name '*.sh' \)
find . -type f ! -size 0 \( -name '*.[chm]' -o -name '*.sh' \) -mtime -8 -ls | awk '{a+=$7}; END {print(a)}'
find . -type f ! -size 0 \( -name '*.[chm]' -o -name '*.sh' \) -mtime -8 -ls -exec stat -c %b {} \; | awk '{a+=$7} END {print a*512}'
tar -fc - * | gzip > archiv.tar.gz
xargs