手动删除以前安装的应用程序的文件夹后，apt-get 不再起作用

Question

我整个周末都在努力将现有的 postgresql 数据库从版本 8.4 升级到 9.1。在我将操作系统从 10.0.4 更新到 12.04 后，我拥有了两个版本的数据库。

我终于被激怒了，在一个错误的判断中，我强行从我的机器上删除了所有 8.4 相关的文件，使用：

find / -type d -name 8.4 2>/dev/null | xargs rm -rf {}

我决定删除它的更好方法是“apt-get remove postgresql-8.4”

当我尝试这样做时，apt-get 报告：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following packages will be REMOVED:
  postgresql-8.4
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 15.5 MB disk space will be freed.
Do you want to continue [Y/n]? y
(Reading database ... 304184 files and directories currently installed.)
Removing postgresql-8.4 ...
find: `/usr/share/postgresql/8.4/tsearch_data': No such file or directory
dpkg: error processing postgresql-8.4 (--remove):
 subprocess installed pre-removal script returned error exit status 1
Errors were encountered while processing:
 postgresql-8.4
E: Sub-process /usr/bin/dpkg returned an error code (1)

如何从我的机器上清除 postgresql 8.4？

[[编辑]]

我尝试后apt-get install --reinstall postgresql-8.4，出现以下错误：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Suggested packages:
  oidentd ident-server
The following NEW packages will be installed:
  postgresql-8.4
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
Need to get 0 B/5,599 kB of archives.
After this operation, 15.5 MB of additional disk space will be used.
Selecting previously unselected package postgresql-8.4.
(Reading database ... 304010 files and directories currently installed.)
Unpacking postgresql-8.4 (from .../postgresql-8.4_8.4.14-0ubuntu12.04.2_amd64.deb) ...
Setting up postgresql-client-8.4 (8.4.14-0ubuntu12.04.2) ...
update-alternatives: error: alternative path /usr/share/postgresql/8.4/man/man1/psql.1.gz doesn't exist.
dpkg: error processing postgresql-client-8.4 (--configure):
 subprocess installed post-installation script returned error exit status 2
dpkg: dependency problems prevent configuration of postgresql-8.4:
 postgresql-8.4 depends on postgresql-client-8.4; however:
  Package postgresql-client-8.4 is not configured yet.
dpkg: error processing postgresql-8.4 (--configure):
 dependency problems - leaving unconfigured
No apport report written because the error message indicates its a followup error from a previous failure.
                                                                                                          Errors were encountered while processing:
 postgresql-client-8.4
 postgresql-8.4
E: Sub-process /usr/bin/dpkg returned an error code (1)

Answer 1

好吧，这真的非常令人讨厌，因为那里有一个依赖嵌套，它不会随着通常的 apt-get purge、apt-get -f install 等一轮而消失。解决这个问题的唯一方法（我重新创建了你在虚拟机中的问题并经过测试）只是在那里放置一个目录以便首先删除。

root@yourbox:/# mkdir -p /usr/share/postgresql/8.4/tsearch_data
root@yourbox:/# apt-get purge postgresql-8.4
root@yourbox:/# apt-get autoremove

由于有一个空目录可供删除，因此在我的虚拟机中，父包的初始清除和子包的自动删除都完成了，没有错误。