What pieces are involved in managing sub domains DNS records in this example

I’m trying to educate myself on DNS management, trying to get the big picture on large domain names architectures. If this is not the right place to ask this kind of question, please let me know! Let’s say we have example.com, serving different services like www.example.com, service1.example.com, service2.example.com from a central point (servers cluster, with…

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Hplip does not detect HP 107a

I have an HP Laser107a (https://support.hp.com/us-en/drivers/selfservice/hp-laser-100-printer-series/24494339/model/24494340) and because fails to be detected on Ubuntu 18.04 I have installed the latest hplip version from hp website. As seen on ubuntu’s manual the lsusb shows: Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub Bus 001 Device 002: ID 1bcf:0005 Sunplus Innovation Technology Inc. Optical…

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