Compare rdb by Walter Hobbs. It was written mostly in perl, and reading the code helped me learn perl.

Code is at github [0]

A pdf doc is at Rutgers [1],

and an intro is archived from sysadmin magazine. [2]

I used it to inventory equipment and to do other admin chores long ago.

[0] https://github.com/ironsmith58/RDB

[1] https://casegroup.rutgers.edu/lnotes/ccb550/spring20/RDB.pdf

[2] https://seann.herdejurgen.com/samag.com/html/v11/i01/a6.htm