Find files modified within the last 6hrs i.e. 0.25 of 1 day
find /home/chris -type f -mtime -0.25
Find directories where name starts with ‘site’
find . -type d -name 'site*'
Find files by text in the file
find . -type f -name "*.java" -exec grep -il string {} \; -i: ignore case -l: show filenames, not the match.