【1】Ubuntu下控制臺輸入sudo apt-get update之后出現(xiàn)的問題：
E: Could not get lock /var/lib/apt/lists/lock - open (11: Resource temporarily unavailable)
E: Unable to lock directory /var/lib/apt/lists/
E: 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?

解決方法：
sudo rm /var/lib/apt/lists/lock
sudo rm /var/cache/apt/archives/lock
再試一次sudo apt-get update就可以了

【2】ubuntu16.04下更新源報(bào)錯(cuò)的問題：
W: http://archive.ubuntukylin.com:10006/ubuntukylin/dists/trusty/Release.gpg: Signature by key 6CE35A4EBAB676094476BE7CD259B7555E1D3C58 uses weak digest a.....

解決方法：
sudo gedit /etc/sources.list.d/ubuntukylin.list，將其中的trust改成xenial，保存
sudo apt-get update
更新源之后還是會(huì)出現(xiàn)一些錯(cuò)誤
sudo apt-get install keyring
sudo apt-get update