If you're using Debian or Ubuntu especially, please use the Tor Project's repository, so you can easily receive updates. In addition, using the package provides other conveniences:

• 你的 ulimit -n 要設定為一個較高的數字，這樣 Tor 便可以保持開啟它所需的所有連線。
• The package creates and uses a separate user, so you don't need to run Tor as your own user.
• The package includes an init script so Tor runs at boot.
• Tor can bind to low-numbered ports, then drop privileges.