如何重新安装mysql？

软件升级中断了，除其他外，mysql和我还无法恢复它。

可能原因：我的启动磁盘快满了；升级在完成之前就填满了磁盘，因此一切都一团糟。我给了系统更多的磁盘，并将/ var移到了自己的分区。我仍然没有尝试恢复mysql。

以下是到目前为止我尝试过的所有操作（全部都是root用户）。首先，mysql无法启动（443）。尝试修复（444，445）失败。尝试删除mysql和（？）apparmor失败（446、7、8）。尝试更有效地删除mysql似乎成功了（449），并且不再看到以前的错误（450，1，2）。无法重新配置Mysql，因为它不再存在（453），但是尝试重新安装它会返回旧的错误消息，我们回到第一个（454）。

我还检查了这个问题（即使就我而言，由于升级到12.04而没有中断：它已经在12.10上运行了） 在升级到12.04之后修复了损坏的myslq-server软件包， 并尝试了其中的建议（458，461， 462）无济于事。

我该怎么办？

这是在3.5.0-25-通用＃39-Ubuntu SMP上进行的2月25日星期一18:26:58 UTC 2013 x86_64 x86_64 x86_64 GNU / Linux

    443  service mysql start
         start: Job failed to start

    444  dpkg-reconfigure mysql-server-5.5
         /usr/sbin/dpkg-reconfigure: mysql-server-5.5
         is broken or not fully installed

    445  apt-get -f install
         ...
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         dpkg: dependency problems prevent configuration of
         mysql-server:
         mysql-server depends on mysql-server-5.5; however:
         Package mysql-server-5.5 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 processing:
           mysql-server-5.5
           mysql-server
         E: Sub-process /usr/bin/dpkg returned an error code (1)

    446  apt-get remove mysql-server
         ...
         Removing mysql-server ...
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         No apport report written because MaxReports is reached already
         Errors were encountered while processing:
           mysql-server-5.5
         E: Sub-process /usr/bin/dpkg returned an error code (1)


    447  apt-get remove apparmor
         ...
         Package 'apparmor' is not installed, so not removed
         0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
         1 not fully installed or removed.
         After this operation, 0 B of additional disk space will be used. 
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         Errors were encountered while processing:
           mysql-server-5.5
         E: Sub-process /usr/bin/dpkg returned an error code (1)


    448  apt-get remove mysql-server
         Reading package lists... Done
         Building dependency tree       
         Reading state information... Done
         Package 'mysql-server' is not installed, so not removed
         0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
         1 not fully installed or removed.
         After this operation, 0 B of additional disk space will be used.
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         Errors were encountered while processing:
           mysql-server-5.5
         E: Sub-process /usr/bin/dpkg returned an error code (1)

    449  dpkg -r mysql-server-5.5
         (Reading database ... 322156 files and directories
         currently installed.)
         Removing mysql-server-5.5 ...
         Processing triggers for man-db ...
         Processing triggers for ureadahead ...

    450  apt-get remove mysql-server
         Reading package lists... Done
         Building dependency tree        
         Reading state information... Done
         Package 'mysql-server' is not installed, so not removed
         0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

    451  apt-get remove apparmor
         Reading package lists... Done
         Building dependency tree       
         Reading state information... Done
         Package 'apparmor' is not installed, so not removed
         0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

    452  apt-get -f install
         Reading package lists... Done
         Building dependency tree       
         Reading state information... Done
         0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

    453  dpkg-reconfigure mysql-server-5.5
         /usr/sbin/dpkg-reconfigure: mysql-server-5.5 is broken
         or not fully installed

    454  apt-get install mysql-server
         Reading package lists... Done
         Building dependency tree       
         Reading state information... Done
         The following extra packages will be installed:
           mysql-server-5.5
         Suggested packages:
           tinyca mailx
         The following NEW packages will be installed:
           mysql-server mysql-server-5.5
         0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
         Need to get 0 B/8,851 kB of archives.
         After this operation, 32.8 MB of additional disk space
         will be used.
         Do you want to continue [Y/n]? 
         Preconfiguring packages ...
         Selecting previously unselected package mysql-server-5.5.
         (Reading database ... 322081 files and directories
         currently installed.)
         Unpacking mysql-server-5.5 (from 
         .../mysql-server-5.5_5.5.29-0ubuntu0.12.10.1_amd64.deb) ...
         Selecting previously unselected package mysql-server.
         Unpacking mysql-server (from 
         .../mysql-server_5.5.29-0ubuntu0.12.10.1_all.deb) ...
         Processing triggers for ureadahead ...
         Processing triggers for man-db ...
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         dpkg: dependency problems prevent configuration of mysql-server:
           mysql-server depends on mysql-server-5.5; however:
         Package mysql-server-5.5 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 processing:
           mysql-server-5.5
           mysql-server
         E: Sub-process /usr/bin/dpkg returned an error code (1)


    458  apt-get remove --purge mysql-server
         Reading package lists... Done
         Building dependency tree       
         Reading state information... Done
         The following packages will be REMOVED:
           mysql-server*
         0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
         2 not fully installed or removed.
         After this operation, 116 kB disk space will be freed.
         Do you want to continue [Y/n]? 
         (Reading database ... 322159 files and directories
         currently installed.)
         Removing mysql-server ...
         Setting up mysql-server-5.5 (5.5.29-0ubuntu0.12.10.1) ...
         start: Job failed to start
         invoke-rc.d: initscript mysql, action "start" failed.
         dpkg: error processing mysql-server-5.5 (--configure):
         subprocess installed post-installation script
         returned error exit status 1
         Errors were encountered while processing:
           mysql-server-5.5
         E: Sub-process /usr/bin/dpkg returned an error code (1)

    461  touch /etc/apparmor.d/local/usr.sbin.mysqld
         (no output)

    462  service mysql start
         start: Job failed to start

首先，删除MySQL：

sudo apt purge mysql-server mysql-client mysql-common
sudo apt autoremove
sudo mv -iv /var/lib/mysql /var/tmp/mysql-backup
sudo rm -rf /var/lib/mysql*

然后重新安装：

sudo apt update
sudo apt install mysql-server
sudo mysql_install_db
sudo /usr/bin/mysql_secure_installation

在Ubuntu 16.04中，针对我的情况进行修复的方法是（请首先备份数据库，数据库将丢失）：

sudo apt remove --purge mysql-server mysql-client mysql-common
sudo apt autoremove
sudo mv -iv /var/lib/mysql /var/tmp/mysql-backup
sudo rm -rf /var/lib/mysql*
sudo apt install mysql-server

（以某种方式，我之前的呼叫apt purge mysql-server似乎没有成功。我认为那apt purge foo等同于apt remove --purge foo...）

我遇到了完全相同的错误，并尝试了您执行的大多数步骤，并获得了相同的结果。以下终于为我工作。

apt-get purge mysql-server mysql-client mysql-common mysql-client-5.5 mysql-server-5.5

之后，mysql安装正常。

我不确定对我来说是什么情况，但是其他解决方案均不起作用，但始终出错。我试过了apt-get purge mysql-*，然后autoremove和autoclean。之后安装就可以了。

**

确保备份数据库，以上命令也可能将其删除

**

如果你只是跑步

sudo apt-get update
sudo apt-get install mysql-server

它会更新mysql，这解决了我更新到16.04 lts后遇到的问题。

或者只是跑

sudo apt-get install lamp-server^

更新所有服务器软件包。

对于MySQL 5.7版本，我按照前面所述删除了MySQL：

sudo apt purge mysql-server mysql-client mysql-common
sudo apt autoremove
sudo rm -rf /var/lib/mysql*

并在帮助下安装它：

sudo apt-get update
sudo apt-get install mysql-server
mysql_secure_installation

要测试是否一切正常：

systemctl status mysql.service

资源

从默认的Ubuntu存储库安装phpMyAdmin。然后运行：

dpkg --configure mysql-server-5.5
apt-get purge mysql-server mysql-client mysql-common mysql-client-5.5 mysql-server-5.5
apt-get autoremove
apt-get autoclean
apt-get update
apt-get install  mysql-server
service mysql restart