linux安装mysql5.7.21

1、检查是否已安装过mariadb，若有便删除（linux系统自带的）

[root@localhost /]# rpm -qa | grep mariadb
[root@localhost /]# rpm -e --nodeps mariadb-libs-5.5.44-2.el7.centos.x86_64

2、检查是否已安装过mysql，若有便删除（linux系统自带的）

[root@localhost /]# rpm -qa | grep mysql
[root@localhost /]# rpm -e –-nodeps mysql-libs-5.1.52.x86_64

3、检查mysql组和用户是否存在，如无创建：

  [root@localhost ~]# cat /etc/group | grep mysql

  [root@localhost ~]# cat /etc/passwd |grep mysql

  [root@localhost ~]# groupadd mysql

  [root@localhost ~]# useradd -r -g mysql mysql

4、从官网下载mysql安装包，解压后移动到/usr/local/mysql下

[root@localhost download]# wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
[root@localhost download]# tar xzvf mysql-5.7.24-linux-glibc2.12-x86_64.tar.gz
[root@localhost download]# mv mysql-5.7.24-linux-glibc2.12-x86_64 /usr/local/mysql

5、在mysql下添加data目录

[root@localhost ~]# mkdir /usr/local/mysql/data

6、更改mysql目录下所有的目录及文件夹所属组合用户

[root@localhost /]# cd /usr/local/ 
[root@localhost local]# chown -R mysql:mysql mysql/
[root@localhost local]# chmod -R 755 mysql/

7、编译安装并初始化mysql，记住命令行末尾的密码：

[root@localhost local]# /usr/local/mysql/bin/mysqld --initialize --user=mysql --datadir=/usr/local/mysql/data --basedir=/usr/local/mysql
2017-08-31T08:50:23.910440Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 
2017-08-31T08:50:23.910635Z 0 [ERROR] Can't find error-message file '/usr/local/mysql/--datadir=/usr/local/mysql/data/share/errmsg.sys'. Check error-message file location and 'lc-messages-dir' con 
figuration directive.2017-08-31T08:50:24.709286Z 0 [Warning] InnoDB: New log files created, LSN=45790 
2017-08-31T08:50:24.767540Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 
2017-08-31T08:50:24.892629Z 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: 6e083b8f-8e29-11e7-88b1- 
005056b427be.2017-08-31T08:50:24.895674Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 
2017-08-31T08:50:24.896645Z 1 [Note] A temporary password is generated for root@localhost: gFamcspKm2+u

8、启动mysql服务

[root@localhost local]# /usr/local/mysql/support-files/mysql.server start

9、做个软连接，重启服务

[root@localhost local]# ln -s /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql 
[root@localhost local]# service mysql restart
Shutting down MySQL.. SUCCESS! 
Starting MySQL. SUCCESS!

10、做个软链接，将安装目录下的mysql 放在/usr/bin 目录下

[root@localhost local]# ln -s /usr/local/mysql/bin/mysql /usr/bin

11、登录msyql，输入密码（密码为步骤7初始化生成的密码）

[root@localhost local]# mysql -u root -p
Enter password:

12、修改密码并开放远程

msql>alter user 'root'@'localhost' identified by '123456';
mysql>use mysql;
msyql>update user set user.Host='%' where user.User='root';
mysql>flush privileges;
mysql>quit

PS:设置远程主机登录，注意下面的your username 和 your password改成你需要设置的用户和密码

mysql>GRANT ALL PRIVILEGES ON *.* TO 'your username'@'%' IDENTIFIED BY 'your password' WITH GRANT OPTION; 

mysql>flush privileges;

13、编辑my.cnf，添加配置文件，配置内容为

 

[root@localhost local]# vi /usr/local/mysql/my.cnf
[mysqld]
port = 3306
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES

14、设置开机自启动

1、将服务文件拷贝到init.d下，并重命名为mysql
[root@localhost local]# cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
2、赋予可执行权限
[root@localhost local]# chmod +x /etc/init.d/mysqld
3、添加服务
[root@localhost local]# chkconfig --add mysqld
4、显示服务列表
[root@localhost local]# chkconfig --list
5、重启服务器
[root@localhost local]# reboot