為什麼我無法成功安裝mysql伺服器？

這很容易。我想做的就是：

aptitude remove mysql-server mysql-server-5.0 --purge
aptitude install mysql-server

但是當我嘗試執行時，我得到了這個錯誤：

root@db2:/etc# aptitude install mysql-server
   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   Reading extended state information
   Initializing package states... Done
   The following NEW packages will be installed:
     libhtml-template-perl{a} mysql-server mysql-server-5.0{a} mysql-server-core-5.0{a}
   0 packages upgraded, 4 newly installed, 0 to remove and 5 not upgraded.
   Need to get 0B/27.7MB of archives. After unpacking 91.1MB will be used.
   Do you want to continue? [Y/n/?] y
   Writing extended state information... Done
   Preconfiguring packages ...
   Selecting previously deselected package mysql-server-core-5.0.
   (Reading database ... 17213 files and directories currently installed.)
   Unpacking mysql-server-core-5.0 (from .../mysql-server-core-5.0_5.1.30really5.0.75-0ubuntu10.2_amd64.deb) ...
   Selecting previously deselected package mysql-server-5.0.
   Unpacking mysql-server-5.0 (from .../mysql-server-5.0_5.1.30really5.0.75-0ubuntu10.2_amd64.deb) ...
    * Stopping MySQL database server mysqld                                                                                              [ OK ]
   Selecting previously deselected package libhtml-template-perl.
   Unpacking libhtml-template-perl (from .../libhtml-template-perl_2.9-1_all.deb) ...
   Selecting previously deselected package mysql-server.
   Unpacking mysql-server (from .../mysql-server_5.1.30really5.0.75-0ubuntu10.2_all.deb) ...
    * Stopping MySQL database server mysqld                                                                                              [ OK ]
   Setting up mysql-server-core-5.0 (5.1.30really5.0.75-0ubuntu10.2) ...
   Setting up mysql-server-5.0 (5.1.30really5.0.75-0ubuntu10.2) ...
    * Stopping MySQL database server mysqld                                                                                              [ OK ]
   /var/lib/dpkg/info/mysql-server-5.0.postinst: line 144: /etc/mysql/conf.d/old_passwords.cnf: No such file or directory
   dpkg: error processing mysql-server-5.0 (--configure):
    subprocess post-installation script returned error exit status 1
   Setting up libhtml-template-perl (2.9-1) ...
   dpkg: dependency problems prevent configuration of mysql-server:
    mysql-server depends on mysql-server-5.0; however:
     Package mysql-server-5.0 is not configured yet.
   dpkg: error processing mysql-server (--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 proce                        ssing:
    mysql-server-5.0
    mysql-server
   E: Sub-process /usr/bin/dpkg returned an error code (1)
   A package failed to install.  Trying to recover:
   Setting up mysql-server-5.0 (5.1.30really5.0.75-0ubuntu10.2) ...
    * Stopping MySQL database server mysqld                                                                                              [ OK ]
   /var/lib/dpkg/info/mysql-server-5.0.postinst: line 144: /etc/mysql/conf.d/old_passwords.cnf: No such file or directory
   dpkg: error processing mysql-server-5.0 (--configure):
    subprocess post-installation script returned error exit status 1
   dpkg: dependency problems prevent configuration of mysql-server:
    mysql-server depends on mysql-server-5.0; however:
     Package mysql-server-5.0 is not configured yet.
   dpkg: error processing mysql-server (--configure):
    dependency problems - leaving unconfigured
   Errors were encountered while processing:
    mysql-server-5.0
    mysql-server
   Reading package lists... Done
   Building dependency tree
   Reading state information... Done
   Reading extended state information
   Initializing package states... Done
   Writing extended state information... Done

aptitude 有時會出現依賴問題，您嘗試過嗎？

sudo apt-get --reinstall install mysql-server [.........]
sudo apt-get remove mysql-server [........]

引用自：https://serverfault.com/questions/104789