树莓派更换清华源，安装aptitude报错：Unable to correct problems, you have held...

smileqq

用清华源，然后安装了一下aptitude，各种问题，具体错误信息如下：
: v" K$ l% a' R[size=1em]

[size=1em]1 [size=1em]2 [size=1em]3 [size=1em]4 [size=1em]5 [size=1em]6 ) c7 Z: p8 {% X, ~ [size=1em]7 3 V3 R% h! p( v0 _+ b+ } [size=1em]8 # q5 h4 b0 t* f4 s( | [size=1em]9 [size=1em]10 / U" D: K) i+ ^# {5 e' Y" W; F [size=1em]11 [size=1em]12 2 \+ L+ ~7 X+ S; b! O& @, j; X& @ [size=1em]13 [size=1em]14

[size=1em][size=1em]pi@raspberrypi:~ $ sudo apt-get install aptitude [size=1em]Reading package lists... Done [size=1em]Building dependency tree       6 H7 f7 }& Q5 z7 l2 E. S) K[size=1em]Reading state information... Done 2 p; L" f) I8 _* D8 q8 l  _; W[size=1em]Some packages could not be installed. This may mean that you have [size=1em]requested an impossible situation or if you are using the unstable [size=1em]distribution that some required packages have not yet been created [size=1em]or been moved out of Incoming. ; ]$ U. }1 ?  b! f[size=1em]The following information may help to resolve the situation: , f. R4 z6 D; a. R7 H [size=1em]The following packages have unmet dependencies: : \4 n( C3 A) i% U( t[size=1em] aptitude : Depends: libapt-pkg5.0 (>= 1.1) but it is not going to be installed . X% b; o. a( ]3 X[size=1em]            Recommends: libparse-debianchangelog-perl but it is not going to be installed [size=1em]E: Unable to correct problems, you have held broken packages. ( o+ E+ K; i7 N' N/ l* R- ]/ g, [

$ U; ~# ^7 D/ F  L( {: y

4 Y" h+ g3 T& J, K# i) {
这个问题百度了很多，但都没有一个合适的，希望各位大佬帮助啊，谢谢

CCxiaom

晕，大神啊

smileqq

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。
2、修改完镜像源后，不要忘了使用命令：sudo apt-get update，sudo apt-get upgrade。
5 B$ r7 j* N" v) \8 _$ Q' ^' I; _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。