今天新装了一个 Ubuntu16.04, apt-get 报错 Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable) E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it? 想了一下,应该是 sources.list 未修改的原因,就把这个替换成清华的大…