# Make a backup just in case.
sudo cp -r /etc/letsencrypt /etc/_letsencrypt

# Remove the old certificate information.
sudo rm -r /etc/letsencrypt/archive/domain.tld
sudo rm -r /etc/letsencrypt/live/domain.tld
sudo rm /etc/letsencrypt/renewal/domain.tld.conf

# Generate a new certificate with the subdomains you want.
sudo /opt/letsencrypt/certbot-auto certonly --webroot -w /path/to/my/app -d 'domain.tld,www.domain.tld'

# Reload Nginx.
sudo service nginx reload

pdfunite in-1.pdf in-2.pdf in-n.pdf out.pdf
pdfunite *.pdf out.pdf
pdfunite $(ls *.pdf | sort -n) output.pdf - ordenado pelo nome dos documentos

http://stackoverflow.com/questions/2507766/merge-convert-multiple-pdf-f…

https://forum.lede-project.org/t/uninstall-lede-tl-wr1043nd-v4/3147

https://wireless.wiki.kernel.org/en/users/drivers/ath9k/btcoex
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=627949#15

http://ask.xmodulo.com/disable-ipv6-linux.html

https://forum.xda-developers.com/showthread.php?t=2339530

http://www.howfunky.com/2010/02/how-to-prevent-ipv6-tunneling-across.ht…

https://www.miuiportugal.pt/forum/threads/redmi-4-prime-pro-qual-rom-a-…

manual unlock do bl - http://en.miui.com/thread-202290-1-1.html

ferramenta unlock antiga - http://xiaomitips.com/download/mi-flash-unlock-tool/

para saber a imagem a aplicar e depois executar o comando substituindo o último asterico pela imagem pretendida:
D:\HDDRecovery\ODDFiles\Tools\imagex /ref D:\HDDRecovery\SWImg\10813XSP*.swm /apply D:\HDDRecovery\SWImg\10813XSP.swm * C:\

https://forum.xda-developers.com/showthread.php?t=2313812

https://www.xda-developers.com/codes-hidden-android/