打开终端，下面一步一步走

sudo systemctl stop ollama
sudo systemctl disable ollama
sudo rm /etc/systemd/system/ollama.service
cd /usr/local/bin
sudo rm $(which ollama)
cd /usr/bin
sudo rm $(which ollama)
cd /bin
sudo rm $(which ollama)
cd
sudo rm -r /usr/share/ollama
sudo userdel ollama
sudo groupdel ollama

OK！