File Descriptors and Redirections

The first question in the File Descriptors and Redirections "How many files exsit on the system that have the .log file extension? I’ve tried locate /*.log |wc -l…the answer I get doesn’t seem to work am I missing something?

locate does not search on the file system. locate search in a database prepared by the tool updatedb.

The tool find could be used to search for files in the file system.

See the documentation displayed by man locate and man find.