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find walks a directory tree and lists everything that matches your tests. ~/project/archive is a deep, messy tree; somewhere in it is puppies.jpg.
This lab is the hands-on companion to the find lesson from Linux Journey (CC BY-SA 4.0).
Start the search in a directory, then give the test:
find archive -name puppies.jpg
Now copy the file you found into found/:
cp <path-you-found> found/
-type d matches directories and -type f regular files. Quote patterns so the shell doesn't expand them first:
find archive -type d -name "MyFolder"
find archive -type f -name "*.log"
-size +10M means bigger than 10 MiB. -mtime +30 means last changed more than 30 days ago:
find archive -type f -size +10M
find archive -type f -mtime +30
find dir -name pattern searches by name; quote wildcards.-type f and -type d select files or directories.-size +10M and -mtime +30 filter by size and age.