https://pve.proxmox.com/wiki/High_Availability

https://jitsi.org/blog/end-to-end-encryption-beyond-buzzwords/
https://nlnet.nl/project/JitsiMeet-E2E/

listar os temporizadores ativos:
systemctl list-timers

analisar um temporizador:
systemctl cat man-db.timer

analisar um serviço:
systemctl cat apt-daily-upgrade.service

https://linuxconfig.org/how-to-schedule-tasks-with-systemd-timers-in-li…

https://linuxexpresso.wordpress.com/2010/03/31/repair-a-broken-ext4-sup…

tcpdump -nni any 'icmp[icmptype] == icmp-echoreply' and h
ost 192.168.1.244

https://hackertarget.com/tcpdump-examples/

https://blog.ipspace.net/2013/01/tcp-mss-clamping-what-is-it-and-why-do…

https://caddyserver.com/docs/install#debian-ubuntu-raspbian

https://campus.barracuda.com/product/websecurityagent/doc/73699516/how-…

para o firefox - about:networking#dns
https://techwiser.com/clear-dns-cache-on-browser/

https://www.hetzner.com/cloud?country=ot