locate

Find filenames quickly. More information: https://keith.github.io/xcode-man-pages/locate.1.html.

Look for pattern in the database. Note: the database is recomputed periodically (usually weekly or daily):

locate "{{pattern}}"

Look for a file by its exact filename (a pattern containing no globbing characters is interpreted as *pattern*):

locate */{{filename}}

Recompute the database. You need to do it if you want to find recently added files:

sudo /usr/libexec/locate.updatedb