E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/universe/d/distlib/python-distli... Size mismatch
E: Failed to fetch http://archive.ubuntu.com/ubuntu/pool/main/r/requests/python-requests_... Size mismatch
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
尝试了sudo apt-get update
尝试了apt-get install --fix-missing
尝试了换源
都无法解决
换一个源试试呢
是源的问题，换个源就可以的了。
如果是ubuntu13.03的系统建议更新为14.04，因为13的软件源已经不更新了。。换源也没用。