安装aptitude报错：Unable to correct problems, you have held broken packages

Touuqu

树莓派更换清华源，安装aptitude报错：Unable to correct problems, you have held broken packages.
# p9 L: J9 m6 X
* ^$ }0 k% h" j! J2 D安装aptitude ，各种问题，具体错误信息如下：
3 b* D3 S% Z4 h0 Z8 [9 J; h0 S  B. e$ d
pi@raspberrypi:~ $ sudo apt-get install aptitude
Reading package lists... Done
3 q* Z) b  D, [- GBuilding dependency tree      
Reading state information... Done
# [+ b1 V( u) ~4 c: n0 X  @& XSome packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
( ^5 R; T' H6 Pdistribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:
/ Y9 N8 `5 h! l5 Y
# _9 I  T6 u2 D& UThe following packages have unmet dependencies:
aptitude : Depends: libapt-pkg5.0 (>= 1.1) but it is not going to be installed
# P7 ~# D3 L! Y- e5 |            Recommends: libparse-debianchangelog-perl but it is not going to be installed
5 f% }% E" }1 ZE: Unable to correct problems, you have held broken packages.
1 E+ R+ W# I* k
* G; _# e' ?! P; t

regngfpcb

想知道答案，感觉这个好难的

Touuqu

1、经过查找，发现原因为树莓派 Linux 系统版本为 buster ，但是使用的镜像源版本却为 stretch ，后来将树莓派使用的镜像源修改为与系统版本一致的源即可。
- U" U5 `( R4 W2、修改完镜像源后，不要忘了使用命令：sudo apt-get update，sudo apt-get upgrade。
3、更新完毕后，即可再次安装想要的软件；这里推荐使用：aptitude 安装所需软件，此工具可以有效地解决软件依赖包等问题。