不小心删除了/usr/bin/python3.5，无法重新安装

Question

操作系统：Ubuntu 14.04

我看到了一个类似的问题，但那里提到的方法都不起作用。

我通过运行安装了 python 3.5：

apt-get install -y software-properties-common && \
add-apt-repository ppa:fkrull/deadsnakes && \
apt-get update
apt-get install -y python3.5 python3.5-dev

我运行出错了ln -sf /usr/bin/python /usr/bin/python3.5，所以符号链接python3.5变成了python2.7.

我试过了：

1.

rm -f /etc/apt/sources.list.d/*
dpkg --configure -a
add-apt-repository ppa:fkrull/deadsnakes
apt-get update
apt-get install --reinstall python3.5 python3.5-dev

2.

apt-get remove --purge python3.5 python3.5-dev
apt-get install python3.5 python3.5-dev

在这两种情况下，我都得到了类似的信息：

/var/lib/dpkg/info/python3.5.postinst: 9: /var/lib/dpkg/info/python3.5.postinst: python3.5: not found
dpkg: error processing package python3.5 (--configure):
 subprocess installed post-installation script returned error exit status 127
dpkg: dependency problems prevent configuration of python3.5-dev:
 python3.5-dev depends on python3.5 (= 3.5.2-1~trusty1); however:
  Package python3.5 is not configured yet.

dpkg: error processing package python3.5-dev (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 python3.5
 python3.5-dev
E: Sub-process /usr/bin/dpkg returned an error code (1)

Answer 1

我修好了它。

查找所有依赖项：

dpkg -l | grep python3.5

删除所有这些：

apt-get --purge remove libpython3.5 libpython3.5-dev libpython3.5-minimal libpython3.5-stdlib python3.5 python3.5-dev python3.5-minimal

重新安装

apt-get install python3.5-dev