AppFlowy/frontend/scripts/linux_installer/postinst

#!/bin/bash
if [ -e /usr/local/bin/AppFlowy ]; then
    echo "Symlink already exists, skipping."
else
    echo "Creating Symlink in /usr/local/bin/appflowy"
    ln -s /opt/AppFlowy/AppFlowy /usr/local/bin/AppFlowy
fi