https://www.linuxbabe.com/command-line/how-to-use-linux-efibootmgr-exam…

https://www.ordinatechnic.com/general-guides/1/Bootloaders/2/GRUB/grub-…

https://unix.stackexchange.com/a/623076

para extrair a página 5 dum documento pdf e gravá-lo noutro:
pdftk ORIG_FILE.pdf cat 5 output NEW_FILE.pdf

para extrair várias páginas:
pdftk ORIG_FILE.pdf cat 1 4 6 output NEW_FILE.pdf

para extrair uma faixa de páginas:
pdftk ORIG_FILE.pdf cat 1-5 output NEW_FILE.pdf

para extrair um misto de páginas e faixas:
pdftk ORIG_FILE.pdf cat 1 5 7 10-12 output NEW_FILE.pdf

https://dre.pt/legislacao-covid-19-por-data-de-publicacao

cat /proc/sys/kernel/random/entropy_avail

https://forum.openwrt.org/t/what-is-entropy/87282
https://dev.archive.openwrt.org/ticket/9631

After setting LANG_DETECTION: false in /usr/share/jiitsi-meet/interface-config.js, defaultLanguage: 'es' in /etc/jitsi/meet/[domain]-config.js started to work.

https://community.jitsi.org/t/unable-to-change-language/25566/9

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…