我尝试遵循https://help.ubuntu.com/community/EOLUpgrades/Feisty链接，但没有成功。我需要将我的系统从 17.04 升级到 17.10(EOL)。
运行以下命令时出现错误：
jenil@jenil-Inspiron-5423:~$ **sudo aptitude update && sudo aptitude upgrade**
Hit http://archive.ubuntu.com/ubuntu artful InRelease
Hit http://archive.ubuntu.com/ubuntu artful-updates InRelease
Hit http://archive.ubuntu.com/ubuntu artful-security InRelease
Ign http://archive.ubuntu.com/ubuntu zesty InRelease
Err http://archive.ubuntu.com/ubuntu zesty Release
404 Not Found [IP: 2001:67c:1560:8001::11 80]
98% [Working]
Current status: 0 (-1281) upgradable.
**E: The repository 'http://archive.ubuntu.com/ubuntu zesty Release' does not have a Release file.**