ubuntu 终端中以下命令报错
sudo apt-get update
这是错误信息
W: The repository 'cdrom://Xubuntu 16.04 LTS _Xenial Xerus_ - Release
amd64 (20160420.1) 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 cdrom://Xubuntu 16.04 LTS _Xenial Xerus_ - Release
amd64 (20160420.1)/dists/xenial/main/binary-amd64/Packages Please use
apt-cdrom to make this CD-ROM recognized by APT. apt-get update cannot
be used to add new CD-ROMs
E: Some index files failed to download. They have been ignored, or old
ones used instead.
答案1
删除软件和更新 -> cdrom:[Xubuntu 16.04 LTS... 中的勾选，然后再次进行更新