Mysql 版本：5.7.23

操作系统：Linux

问题描述：

只能通过Linux系统账号Root命令行进入数据库，无法使用JDBC，远程连接工具进入数据库。

报错：ERROR 1698 (28000): Access denied for user 'root'@'localhost'

这个问题明显就是没有开放远程连接授权，所以导致只能使用Linux的Root账号登录。

解决流程

1.找到/etc/mysql/mysql.conf.d/mysqld.cnf文件，在[mysqld]最后面加skip-grant-tables

#

# The MySQL database server configuration file.

#

# You can copy this to one of:

# - "/etc/mysql/my.cnf" to set global options,

# - "~/.my.cnf" to set user-specific options.

#

# One can use all long options that the program supports.

# Run program with --help to get a list of available options and with

# --print-defaults to see which it would actually understand and use.

#

# For explanations see

# https://dev.mysql.com/doc/mysql/en/server-system-variables.html

# This will be passed to all mysql clients

# It has been reported that passwords should be enclosed with ticks/quotes

# escpecially if they contain "#" chars...

# Remember to edit /etc/mysql/debian.cnf when changing the socket location.

# Here is entries for some specific programs

# The following values assume you have at least 32M ram

[mysqld_safe]

socket = /var/run/mysqld/mysqld.sock

nice = 0

[mysqld]

#

# * Basic Settings

#

user = mysql

pid-file = /var/run/mysqld/mysqld.pid

socket = /var/run/mysqld/mysqld.sock

port = 3306

basedir = /usr

datadir = /var/lib/mysql

tmpdir = /tmp

lc-messages-dir = /usr/share/mysql

skip-external-locking

# 加入的内容,开启跳过权限校验

skip-grant-tables

#

# Instead of skip-networking the default is now to listen only on

# localhost which is more compatible and is not less secure.

bind-address = 127.0.0.1

#

# * Fine Tuning

#

key_buffer_size = 16M

max_allowed_packet = 16M

thread_stack = 192K

thread_cache_size = 8

# This replaces the startup script and checks MyISAM tables if needed

# the first time they are touched

myisam-recover-options = BACKUP

#max_connections = 100

#table_open_cache = 64

#thread_concurrency = 10

#

# * Query Cache Configuration

#

query_cache_limit = 1M

query_cache_size = 16M

#

# * Logging and Replication

#

# Both location gets rotated by the cronjob.

# Be aware that this log type is a performance killer.

# As of 5.1 you can enable the log at runtime!

#general_log_file = /var/log/mysql/mysql.log

#general_log = 1

#

# Error log - should be very few entries.

#

log_error = /var/log/mysql/error.log

#

# Here you can see queries with especially long duration

#slow_query_log = 1

#slow_query_log_file = /var/log/mysql/mysql-slow.log

#long_query_time = 2

#log-queries-not-using-indexes

#

# The following can be used as easy to replay backup logs or for replication.

# note: if you are setting up a replication slave, see README.Debian about

# other settings you may need to change.

#server-id = 1

#log_bin = /var/log/mysql/mysql-bin.log

expire_logs_days = 10

max_binlog_size = 100M

#binlog_do_db = include_database_name

#binlog_ignore_db = include_database_name

#

# * InnoDB

#

# InnoDB is enabled by default with a 10MB datafile in /var/lib/mysql/.

# Read the manual for more InnoDB related options. There are many!

#

# * Security Features

#

# Read the manual, too, if you want chroot!

# chroot = /var/lib/mysql/

#

# For generating SSL certificates I recommend the OpenSSL GUI "tinyca".

#

# ssl-ca=/etc/mysql/cacert.pem

# ssl-cert=/etc/mysql/server-cert.pem

# ssl-key=/etc/mysql/server-key.pem

保存后，重启服务sudo service mysql restart.