https://upload.wikimedia.org/wikipedia/commons/1/1b/Linux_Distribution_…

https://i.redd.it/30ogy2a7cya21.png
https://www.reddit.com/r/linux/comments/agw26l/understanding_debian_the…

no cli, editando o ficheiro /etc/config/firewall:
config rule
option dest 'wan'
option src 'lan'
option name 'Jumanji'
option target 'REJECT'
list src_mac '00:14:4F:FC:00:00'
list src_mac '00:14:4F:FF:FF:FF'
option start_time '00:00:00'
option stop_time '08:30:00'
option weekdays 'Mon Tue Wed Thu Fri'

no gui, seguindo Network->Firewall->Traffic Rules

no ficheiro de configuração do servidor ssh adicionar:
Match User even-more-restricted-guy
PermitOpen 127.0.0.1:12345
X11Forwarding no
AllowAgentForwarding no
ForceCommand /bin/false

https://unix.stackexchange.com/questions/14312/how-to-restrict-an-ssh-u…

use moodle;
show tables;
describe mdl_auth_oidc_token;
select * from mdl_auth_oidc_token where oidcusername=1;
use escola;
select * from oauth2_server_token where uid=1;
delete from oauth2_server_token where uid=1;


tracker daemon -t
cd ~/.config/autostart
cp -v /etc/xdg/autostart/tracker-*.desktop ./
for FILE in tracker-*.desktop; do echo Hidden=true >> $FILE; done
rm -rf ~/.cache/tracker ~/.local/share/tracker
tracker status

https://gist.github.com/vancluever/d34b41eb77e6d077887c

ffmpeg -i input.mkv -codec copy output.mp4

https://askubuntu.com/questions/50433/how-to-convert-mkv-file-into-mp4-…

https://www.dns.pt/pt/registrar/ser-registrar-pt/

descarregar o pacote de: https://go.microsoft.com/fwlink/p/?linkid=2112886

para instalar executar o comando:
dpkg -i /home/francisco/Transferências/teams_1.3.00.5153_amd64.deb