乌班图14.10升级

apt-get is a tool for handling dpkg packages and handles one package at a time. There's may be a case that your previous action is still engaging the apt-get engine. Just like @karel suggested, 'close first and then only try another'

Note: If its not solving the problem and neither rebooting, maybe some old apt-get thread was halted while executing, leaving apt locked.   You'll need to delete the lock file with sudo rm /var/lib/apt/lists/lock and also the lock file in cache directory with sudo rm /var/cache/apt/archives/lock



通过：

http://jingyan.baidu.com/article/7c6fb42809854380652c9067.html

然后：使用sudo apt-get update   

                 sudo apt-get  upgrade

          更新后 使用sudo update-mananger  -d 就可以跟新版本了