安装aptitude会出现依赖错误

[caogen19]

sudo apt-get install aptitude
Reading package lists... Done
Building dependency tree
Reading state information... Done
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:
aptitude : Depends: libapt-pkg4.10
Depends: libept1 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.
安装aptitude会出现依赖错误，不知道这一类如何解决，请大神帮忙看看哦

[caogen19]

我去安装依赖发现已经有了，只是版本最新
sudo apt-get install libapt-pkg4.1
Reading package lists... Done
Building dependency tree
Reading state information... Done
Note, selecting 'libapt-pkg4.10' for regex 'libapt-pkg4.1'
Note, selecting 'libapt-pkg4.12' for regex 'libapt-pkg4.1'
libapt-pkg4.12 is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

[caogen19]

有谁遇到过这类问题吗，求教，现在还没解决。。。。

[astolia]

你先用sudo apt-get update更新下软件包列表，再sudo apt-get dist-upgrade把能升的级都升了，再去安装。如果还出错，那就换个源