sudo apt-get upgrade 错误

sudo apt-get upgrade 错误

升级 Ubuntu 时出现此错误:

$ sudo apt-get upgrade
error Malformed line 1 in source list /etc/apt/sources.list (type) E: The list of sources could not be read

源列表中的第 1 行如下:

123#deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted 

答案1

将该行从:

123#deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted

到:

#deb cdrom:[Ubuntu 16.04.3 LTS _Xenial Xerus_ - Release amd64 (20170801)]/ xenial main restricted

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