To find recently modified files on a Linux system use:
find . -mtime -2 -ls
In the above example the dot says start at the current directory and looks in that and all directories below it. The -2 tells it to search for files modified in the last two days.
Something like this:
find /home/nobby -mtime -4 -ls
would search /home/nobby and all its subdirectories for files modified in the last 4 days.