You might want to look at locatedb and frcode - https://manpages.ubuntu.com/manpages/bionic/man5/locatedb.5.html https://manpages.ubuntu.com/manpages/bionic/man

You might want to look at locatedb and frcode - https://manpages.ubuntu.com/manpages/bionic/man5/locatedb.5.html https://manpages.ubuntu.com/manpages/bionic/man5/locatedb.5.... If you want to skim, check out the EXAMPLE section toward the bottom.