Ubuntu update时出错E:

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?

以上错误多是由于上一次安装不完整，

解决办法：

    sudo rm /var/cache/apt/archives/lock

sudo rm /var/lib/dpkg/lock

sudo dpkg --configure -a

sudo apt-get update 

ipython 安装方式：sudo apt -get install ipython

支持命令行不全

whereis ipython

$: /usr/bin/ipython

$: /usr/bin/python3.5 /usr/bin/python3.5m /usr/bin/python /usr/bin/python2.7 /usr/lib/python3.5 /usr/lib/python2.7 /etc/python3.5 /etc/python /etc/python2.7 /usr/local/lib/python3.5 /usr/local/lib/python2.7 /usr/include/python3.5m
/usr/include/python2.7 /usr/share/python /usr/share/man/man1/python.1.gz