關於在Linux虛擬機中Mysql的亂碼問題

環境：

虛擬機：VMware® Workstation 12 Pro

Linux發行版： Ubuntu 16.04.1 LTS (GNU/Linux 4.4.0-47-generic x86_64)

關於安裝Mysql的方式採用此博客中的在線安裝方式：http://www.javashuo.com/article/p-acgxdtvm-eh.html。

本博客旨在解決的問題：

將Linux中的MySql編碼從：

變爲：

分析Mysql啓動時加載配置文件的順序：

執行mysql --help命令，在輸出的信息中咱們能夠看到這個描述：

此描述說明了，Mysql加載配置文件的順序是

/etc/my.cnf -> /etc/mysql/my.cnf -> ~/.my.cnf

而且後面的文件的配置會覆蓋前面的配置。

咱們打開/etc/mysql/my.cnf這個文件，發現這個文件裏除了註釋就只有兩條語句以下：

這說明Mysql會加載這兩個目錄下的全部 .cnf 結尾的文件。

咱們打開/etc/mysql/mysql.conf.d目錄發現有以下文件：

咱們打開mysqld.cnf文件，發現裏面的內容就是這對Mysql服務器端設置的內容，開頭的內容以下：

從這段描述中咱們能夠知道，咱們能夠把這裏面的內容所有複製到/etc/mysql/my.cnf中將其做爲全局選項使用。

故有了解決方案：

首先咱們打開/etc/mysql/mysql.conf.d/mysqld.cnf文件，將其內容複製到/etc/mysql/my.cnf文件中，注意要保留/etc/mysql/my.cnf文件中原有的兩條語句。

而後註釋掉新的/etc/mysql/my.cnf文件中的!includedir /etc/mysql/mysql.conf.d/語句。

而後在新的/etc/mysql/my.cnf文件中的[mysqld]的下方加上此語句character-set-server=utf8，同時找到server-id選項將其註釋去掉。

一個全新的完整的/etc/mysql/my.cnf文件以下：

#
# 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
# http://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]
# The default character set that will be used when a new schema or table is
# created and no character set is defined
character-set-server=utf8
#
# * 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
#
# 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_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
#log_slow_queries	= /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
!includedir /etc/mysql/conf.d/
#!includedir /etc/mysql/mysql.conf.d/

查看mysql編碼問題是否解決：

重啓mysql服務，使用service mysql restart命令。

而後鏈接到mysql，使用mysql -u root -p命令，而後輸入密碼成功鏈接到mysql。

輸入show variables like "chara%";命令查看到以下圖所示結果表示成功修改了mysql的默認編碼：