# apt update
# apt install git python3-pip python3-venv
# useradd -r -m -d /var/lib/radicale -s /bin/bash radicale
# mkdir /etc/radicale
# nano /etc/radicale/radicale.conf

[server]
# Bind to all IP addresses (0.0.0.0) instead of just localhost
hosts = 0.0.0.0:5232
[auth]
type = htpasswd
htpasswd_filename = /etc/radicale/users
htpasswd_encryption = bcrypt
[storage]
filesystem_folder = /var/lib/radicale/collections
[web]
type = radicale_infcloud

# htpasswd -c -B /etc/radicale/users yourusername
# htpasswd -B /etc/radicale/users anotheruser
# ufw allow 5232/tcp
# ufw reload
# su radicale
$ cd ~
$ python3 -m venv venv
$ source venv/bin/activate
$ pip install radicale bcrypt git+https://github.com/Unrud/RadicaleInfCloud.git
$ radicale --config /etc/radicale/radicale.conf

http://your-server-ip:5232/

$ exit
# nano /etc/systemd/system/radicale.service

[Unit]
Description=Radicale CalDAV and CardDAV Server
After=network.target
[Service]
User=radicale
Group=radicale
ExecStart=/var/lib/radicale/venv/bin/radicale --config /etc/radicale/radicale.conf
WorkingDirectory=/var/lib/radicale
Restart=on-failure
LimitNOFILE=4096
[Install]
WantedBy=multi-user.target

# systemctl daemon-reload
# systemctl enable radicale
# systemctl start radicale
# systemctl status radicale

# apt install apache2 certbot python3-certbot-apache
# nano /etc/apache2/sites-available/radicale.conf

<VirtualHost *:80>
  ServerName your_domain.com
  ProxyPass / http://localhost:5232/
  ProxyPassReverse / http://localhost:5232/
</VirtualHost>

# ufw allow 80/tcp
# ufw allow 443/tcp
# ufw reload
# certbot --apache -d your_domain.com

https://your_domain.com

# sudo systemctl status certbot.timer
# sudo certbot renew --dry-run