Using Certbot to remove SSL Certificates
March 7, 2026
Check Certificates Delete Certificates
Certbot issues SSL Certificates for Nginx on Ubuntu
March 7, 2026
Install certbot Check certbot version Using certbot to issue Certificates (DNS-01 challenge) Add a DNS TXT record to pass the challenge If pass the challenge Check Certificates Check Nginx settings Restart Nginx
Download Proxmox backup files
December 24, 2025
Using scp to download Proxmox backup files to local computer From local computer: PS: Proxmox backup files under “/var/lib/vz/dump/”.
Wifi on Old Mac with Ubuntu
November 8, 2025
Check Wifi adapter Broadcom Adapter BCM4360 Install packages Reboot, and Wifi is working.
Remove Proxmox Cluster
September 8, 2025
Change Cluster expected number Remove master node