do-release-upgrade为嘛不要管理员权限

[百草谷居士]

在ubuntu系统中，无论是apt更新或升级，或者使用GUI界面的更新管理器或者新立得，都需要sudo或者root权限。
但是，唯独这个do-release-upgrade却不需要sudo，直接在命令行输入，就会升级到下一个版本，最要命的是，-d参数可以升级到开发版，这可是极具破坏性啊

为什么会这样？难道是个bug！

[astolia]

它是用sudo来提权的。你肯定是运行do-release-upgrade之前用sudo运行过其他命令

[poloshiao]

唯独这个do-release-upgrade却不需要sudo

1. 需要加 sudo 而且需要從 tty 界面執行 (如果圖形界面已啟用 最好先關閉圖形界面)
1-1. 參見
https://wiki.ubuntu.com/BionicBeaver/Re ... S_or_17.10
To upgrade on a server system:
Install update-manager-core if it is not already installed.
Make sure the Prompt line in /etc/update-manager/release-upgrades is set to 'normal' if you want non-LTS upgrades, or 'lts' if you only want LTS upgrades.
Launch the upgrade tool with the command sudo do-release-upgrade
Follow the on-screen instructions.
Note that the server upgrade will use GNU screen and automatically re-attach in case of dropped connection problems.