Find & Copy
find /path/to/find -name '*.txt' -exec cp {} /new/path \;
Find & Handling Spaces in File Names
find . -print0 | xargs -0 <command>
find . -print0 | while read -d $'\0' file; do cp -v "$file" /tmp; done
Find and Change Modes
find public_html/ -type d -exec chmod 755 {} +