fid

fid [OPTION] FILENAME [FILENAME2]

List identifiers that occur in FILENAME, or if FILENAME2 is also given list the identifiers that occur in both files.

-f, --file=FILE

file name of ID database

--help

display this help and exit

--version

output version information and exit

Report bugs to bug-idutils@gnu.org

The full documentation for the id-utils package is maintained as a Texinfo manual. If the info and id-utils packages are properly installed, the command

info 'ID database'

should give you access to the complete manual.