Calibre
Create groups and users for Calibre
# groupadd -g 4101 calibre
# useradd -g calibre -M -r -u 4101 -s /bin/bash calibre
Manager users
$ calibre-server --manage-users
Add a book to existing library (-a author -i ISBN -l language -S seriesnumber -t title)
$ calibredb add --with-library http://localhost:8080#korean -a 공자 -i 9788997876068 -l ko -S 1 -t 한글논어 --username cj --password mypasswordhere "Korean/01.한글논어.pdf"
References
How To Create a calibre Ebook Server on Ubuntu 20.04 | DigitalOcean