locate test.txt, search for all files named test.txt in the system and return their paths.locate -i test.txt, search for all files named test.txt in the system, case-insensitive, and return their paths.locate -r '.*/test\\.txt$', search for all files ending in test.txt in the system and return their paths.locate -c test.txt, search for all files named test.txt in the system and return their count.locate -l 5 test.txt, search for the first 5 files named test.txt in the system and return their paths.locate -e test.txt, search for all files named test.txt in the system, exact match, and return their paths.locate -m "*.txt", search for all files containing .txt in their names in the system and return their paths.