Download the file needed here https://github.com/glpi-project/glpi-agent/releases

When ask input the url from the glpi installation https://www.domain.com/glpi/ or https://www.domain.com/ 

After install on Windows force a inventory scan with the command http://localhost:62354/


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A linux installation 

wget https://github.com/glpi-project/glpi-agent/releases/download/1.10/glpi-agent-1.10-linux-installer.pl

chmod -vv 777 glpi-agent-1.10-linux-installer.pl

./glpi-agent-1.10-linux-installer.pl

https://www.domain.com/glpi/

glpi-agent

systemctl enable glpi-agent
systemctl start glpi-agent
systemctl status glpi-agent