How to install fcgiwrap for Nginx on Ubuntu 22.04 / 20.04

To install fcgiwrap for Nginx on Ubuntu 22.04 or 20.04, you can use the following steps:

1. Install the dependencies for fcgiwrap:
   sudo apt-get install libfcgi-dev fcgiwrap
   This installs the required packages for building and running fcgiwrap.

2. Add the fcgiwrap user to the www-data group:
   sudo usermod -a -G www-data fcgiwrap
   This allows the fcgiwrap user to access the Nginx web root directory.

3. Create a configuration file for fcgiwrap:
   sudo nano /etc/systemd/system/fcgiwrap.service

4. Add the following lines to the configuration file:

[Unit]
Description=FastCGI Wrapper
After=network.target

[Service]
Type=simple
ExecStart=/usr/sbin/fcgiwrap
User=www-data
Group=www-data
Restart=always
PrivateTmp=true
PrivateDevices=true
ProtectSystem=full
NoNewPrivileges=true
WorkingDirectory=/var/www

[Install]
WantedBy=multi-user.target

These lines define the fcgiwrap service and specify the user and group to run it under, as well as the working directory.

5. Save and close the configuration file.

6. Enable and start the fcgiwrap service:
   sudo systemctl enable fcgiwrap
sudo systemctl start fcgiwrap

You can verify that the service is running by checking the status:
sudo systemctl status fcgiwrap

fcgiwrap is a FastCGI wrapper that allows you to run CGI scripts with Nginx. It is useful for running scripts that are not natively supported by Nginx, such as Perl or Python scripts.

Note: These steps assume that you are using a system that uses the systemctl command to manage services. If you are using a different init system or a different Linux distribution, you may need to use different commands to install and configure fcgiwrap.