卸载postgres-xc失败

Question

在尝试设置rails环境以使用postgresql时，我错误地安装了postgres-xc。

但是，在安装过程中发生了错误，因此，当我试图删除包时，会得到以下错误：

The following packages will be REMOVED:  

  postgres-xc   
   0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.  
1 not fully installed or removed.  
After this operation, 17.2 MB disk space will be freed.  
Do you want to continue [Y/n]? y  
(Reading database ... 269015 files and directories currently installed.)  
Removing postgres-xc ...  
dpkg (subprocess): unable to execute installed pre-removal script  (/var/lib/dpkg/info/postgres-xc.prerm): No such file or directory  
dpkg: error processing postgres-xc (--remove):  
 subprocess installed pre-removal script returned error exit status 2  
 * Starting Postgres-XC datanode                                                                                                                                                   pg_ctl: another server might be running; trying to start server anyway  
pg_ctl: another server might be running; trying to start server anyway  
                                                                                                                                                                            [ OK ]
 * Starting Postgres-XC coordinator                                                                                                                                                  pg_ctl: another server might be running; trying to start server anyway  
                                                                                                                                                                          [ OK ]  
 * Starting Postgres-XC gtm                                                                                                                                                      gtm_ctl: another server might be running; trying to start server anyway  
gtm_ctl: could not start server  
Examine the log output.  
invoke-rc.d: initscript postgres-xc, action "start" failed.  
dpkg: error while cleaning up:  
 subprocess installed post-installation script returned error exit status 1  
Errors were encountered while processing:  
 postgres-xc  
E: Sub-process /usr/bin/dpkg returned an error code (1)  

谷歌展示了一些解决方案，比如编辑/var/lib/dpkg/info/postgres-xc.prerm文件以包含exit 0，但这是行不通的。另外，请注意，它甚至不识别该文件。

Answer 1

使用命令打开文件

sudo nano /var/lib/dpkg/status

然后删除已损坏的包postgres-xc和有关它的整个信息块并保存该文件。

那就去做

apt-get install -f

apt-get update