升級 Tor 中繼或將其移至另一台電腦時，請務必保留相同的身份金鑰 (儲存在
If you are a bridge operator, also make sure to keep
pt_state/. It contains data required for your bridge to keep working with the same bridge line.
For simplicity, just copying over the entire DataDirectory should work too.
You may wish to keep backups of these identity keys, plus pt_state for a bridge, so you can restore the relay if something goes wrong.