三更_雨

摘要： 今天在ubuntu进行ssh安装的时候，出现如下错误。Reading package lists... DoneBuilding dependency tree... DonePackage ssh is not available, but is referred to by another package.This may mean that the package is missing, has been obsoleted, oris only available from another source这个问题的原因是ubuntu的/etc/apt/source.list中的源比较旧了 阅读全文