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我希望有更多知识的人能在Ubuntu16.04及以后的版本中解释一些关于做apt-get upgrade的事情。我看到的行为是,apt-get upgrade有时不会安装新的内核包,有时会:The following packages have been kept back:我知道做dist-upgrade会安装这些软件包(所以不要重复这个<e