用户‘debian-sys-maint’访问被拒绝-正在安装 mysql？

Question 1

虽然有点晚了，但还是要说：首先，我在

Distributor ID: Ubuntu
Description:    Ubuntu 16.10
Release:    16.10
Codename:   yakkety

我不得不“取消选中”一些软件存储库。这可以在选项卡Software & Updates上的 GUI上轻松完成Other Software。我取消选中了：

不稳定的存储库
xenial 存储库
“升级到 yakkety 时禁用”存储库

我唯一检查过的存储库是：

软件和更新窗口

然后，我通过以下方式解决了这个问题：

sudo su

root@1w3j: mysql -u root -p
Enter password:
mysql> GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY '<your password>';
ERROR 1819 (HY000): Your password does not satisfy the current policy requirements

如果出现错误（1819），请在 mysql 终端上输入此内容

mysql> uninstall plugin validate_password;

然后重启mysql：systemctl restart mysql

最后

apt install -f

修复损坏的依赖关系

如果错误仍然存在，请再次进入 mysql 终端，登录：输入：

mysql> GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY '<your password>'

apt -f install最后一次。

Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  libmecab2
Use 'sudo apt autoremove' to remove it.
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
2 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up mysql-server-5.7 (5.7.17-0ubuntu0.16.10.1) ...
Checking if update is needed.
Checking server version.
Running queries to upgrade MySQL server.
Checking system database.
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.engine_cost                                  OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.gtid_executed                                OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.innodb_index_stats                           OK
mysql.innodb_table_stats                           OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.proxies_priv                                 OK
mysql.server_cost                                  OK
mysql.servers                                      OK
mysql.slave_master_info                            OK
mysql.slave_relay_log_info                         OK
mysql.slave_worker_info                            OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
The sys schema is already up to date (version 1.5.1).
Checking databases.

(your databases will be shown here...)

Upgrade process completed successfully.
Checking if update is needed.
Setting up mysql-server (5.7.17-0ubuntu0.16.10.1) ...

其他解决方法是：apt -u dist-upgrade

Answer