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“sudo apt-get update”错误

tag-icon • tag-icon apt package-management updates update-manager
“sudo apt-get update”错误

当我进入终端时，sudo apt-get update出现以下错误。有什么解决方法吗？

Fetched 306 kB in 9s (31.7 kB/s)                                               
Reading package lists... Done
W: The repository 'http://ppa.launchpad.net/relan/exfat/ubuntu xenial Release' does not have a Release file.
N: Data from such a repository can't be authenticated and is therefore potentially dangerous to use.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: Failed to fetch http://ppa.launchpad.net/relan/exfat/ubuntu/dists/xenial/main/binary-amd64/Packages  404  Not Found
E: Some index files failed to download. They have been ignored, or old ones used instead.

答案1

这是我所做的（在 Ubuntu 16.04 上）：

在桌面 GUI 软件中心更新程序中，转到其他软件选项卡并取消选中

http://ppa.launchpad.net/relan/exfat/ubuntu xenial main

我认为发生了什么：我运行时sudo apt-get install exfat-fuse exfat utils没有先加上apt-get update，然后加上apt-get upgrade。系统是新安装的，我想直接跳到格式化 SD 卡！

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