Shell Fleet Agent Ubuntu one-command installer
==============================================

Default one-liner:
  curl -fsSL https://filesv.vnstech.cloud/install-shellfleet-agent-ubuntu.sh | sudo -E bash

The script installs an agent service and enrolls it to:
  https://agent.vnstech.cloud

It auto-detects proxy from:
  - SHELLFLEET_PROXY
  - HTTPS_PROXY / HTTP_PROXY / lowercase variants
  - /etc/environment and apt proxy files

Override proxy explicitly:
  curl -fsSL https://filesv.vnstech.cloud/install-shellfleet-agent-ubuntu.sh | \
    sudo -E SHELLFLEET_PROXY=http://proxy.company.local:3128 bash

Override group:
  curl -fsSL https://filesv.vnstech.cloud/install-shellfleet-agent-ubuntu.sh | \
    sudo -E SHELLFLEET_GROUP=/Customer/Prod bash

During enrollment, enter a Shell Fleet admin or agent-role account.
After install:
  systemctl status shellfleet-agent
  journalctl -u shellfleet-agent -f