centos7安装 MySQL5.7.19

ssplyh

　　环境:虚拟机+centos7

• 　　1.下载二进制包，下面mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz链接是官网
  

cd /usr/local/srcwget  https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz

• 　　2.解压，改名
  

[root@beta src]# tar zxvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz[root@beta src]# ls
index.html?id=471614  mysql-5.7.19-linux-glibc2.12-x86_64  mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# mv mysql-5.7.19-linux-glibc2.12-x86_64 /usr/local/mysql

• 　　3. 初始化
  

[root@beta mysql]# useradd -M -s /sbin/nologin  mysql[root@beta mysql]# ls
bin  COPYING  docs  include  lib  man  README  share  support-files
[root@beta mysql]# mkdir -p /usr/local/mysql/data/mysql
[root@beta mysql]# chown mysql /usr/local/mysql/data/mysql　　下面这步注意最后一句：
[root@beta mysql]# ./bin/mysqld  --initialize --user=mysql --datadir=/usr/local/mysql/data/mysql
2017-09-27T03:44:47.999985Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-09-27T03:44:49.011240Z 0 [Warning] InnoDB: New log files created, LSN=45790
2017-09-27T03:44:49.180334Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-09-27T03:44:49.245777Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 3649ce8c-a336-11e7-a43f-000c292b2832.
2017-09-27T03:44:49.266053Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2017-09-27T03:44:49.268172Z 1 [Note] A temporary password is generated for root@localhost: ADB&yGx-d8ab ADB&yGx-d8ab 是密码　　接着执行：
[root@beta mysql]# ./bin/mysql_ssl_rsa_setup --datadir=usr/local/mysql/data/mysql
Generating a 2048 bit RSA private key
......................+++
...+++
writing new private key to 'ca-key.pem'
-----
Generating a 2048 bit RSA private key
.........................+++
...............................................................................+++
writing new private key to 'server-key.pem'
-----
Generating a 2048 bit RSA private key                                          
....................+++
.......................+++
writing new private key to 'client-key.pem'

• 　　4. 拷贝配置文件和启动脚本
  

• 　　先检查是否有/etc/my.cnf,如果没有
  
  

cp support-files/my-default.cnf  /etc/my.cnf　　编辑/etc/my.cnf,重点修改下面几个，其他的尽量注释掉：
basedir = /usr/local/mysql
datadir = //usr/local/mysql/data/mysql
socket = /tmp/mysql.sock　　2.启动脚本
cp support-files/mysql.server /etc/init.d/mysqld　　

　　编辑/etc/init.d/mysqld，只修改下面几个：
basedir=/usr/local/mysql
datadir=/data/mysql　　将/etc/init.d/mysqld加入启动项：
[root@beta mysql]# chkconfig --add mysqld
[root@beta mysql]# chkconfig --list
注意：该输出结果只显示 SysV 服务，并不包含原生 systemd 服务。SysV 配置数据可能被原生 systemd 配置覆盖。
      如果您想列出 systemd 服务,请执行 'systemctl list-unit-files'。
      欲查看对特定 target 启用的服务请执行
      'systemctl list-dependencies [target]'。
mysqld          0:关    1:关    2:开    3:开    4:开    5:开    6:关
netconsole      0:关    1:关    2:关    3:关    4:关    5:关    6:关
network         0:关    1:关    2:开    3:开    4:开    5:开    6:关

• 　　5. 启动服务
  

/etc/init.d/mysqld start

• 　　6.设置root密码
  

• 　　用初始密码登陆（见上面第3步）
  

/usr/local/mysql/bin/mysql -uroot -p‘初始密码’ #-p和’’不能隔开　　

　　出现mysql>的时候，输入set password = password('新密码')；
　　退出，用新密码登陆
　　2. 忘记初始密码
　　给/etc/my.cnf/[mysqld]下面增加一行skip-grant-tables,重启 mysqld：/etc/init.d/mysqld restart
[mysqld]
skip-grant-tables
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data/mysql
socket=/tmp/mysql.sock
[root@beta ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL.. SUCCESS!　　重新登录 mysql：
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot　　mysql>后输入：update mysql.user set authentication_string=password('123333') where user='root';
mysql> update mysql.user set authentication_string=password('123333') where user='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1  Changed: 1  Warnings: 1　　退出，删除 my.cnf 加入的skip-grant-tables，重启mysqld
　　新密码重新登录 mysql：
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot -p'123333'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor.  Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.7.19 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
affiliates. Other names may be trademarks of their respective
owners.
Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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