• Приступая к работе
• Certbot

val@val:~$ mkdir mgtu

val@val:~$ cat mgtu/index.html

<h1>val.mgtu.ru</h1>

root@val:~# cat /etc/apache2/sites-available/val.mgtu.ru.conf

<VirtualHost *:80>
  ServerName val.mgtu.ru
  DocumentRoot /home/val/mgtu
  <Directory /home/val/mgtu>
    Require all granted
  </Directory>
</VirtualHost>

root@val:~# a2ensite val.mgtu.ru

root@val:~# systemctl reload apache2

• http://val.mgtu.ru

root@val:~# snap install --classic certbot

root@val:~# certbot certonly --manual

...
Create a file containing just this data:

MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM

And make it available on your web server at this URL:

http://val.mgtu.ru/.well-known/acme-challenge/NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN
...
Press Enter to Continue
...

val@val:~$ mkdir -p mgtu/.well-known/acme-challenge/

val@val:~$ cat mgtu/.well-known/acme-challenge/NNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNNN

MMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMM

root@val:~# cat /etc/apache2/sites-available/val.mgtu.ru.conf

...
<IfModule mod_ssl.c>
  <VirtualHost *:443>
    ServerName val.mgtu.ru
    DocumentRoot /home/val/mgtu
    <Directory /home/val/mgtu>
      Require all granted
    </Directory>
    SSLEngine on
    SSLCertificateFile /etc/letsencrypt/live/val.mgtu.ru/fullchain.pem
    SSLCertificateKeyFile /etc/letsencrypt/live/val.mgtu.ru/privkey.pem
</VirtualHost>

• https://val.mgtu.ru