CentOS7 安装 单机 Mysql

1.解压文件

[root@centos3 ~]# tar -zxvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz -C /usr/local/

2.重命名

[root@centos3 ~]# cd /usr/local/

[root@centos3 local]# mv mysql-5.7.19-linux-glibc2.12-x86_64/ mysql

3.配置环境变量

[root@centos3  local]# vi + /etc/profile

[root@centos3  local]# source  /etc/profile

4.创建组和用户并授权

[root@centos3 local]# groupadd mysql

[root@centos3 local]# useradd -r -g mysql -s /bin/false mysql

[root@centos3 local]# chown -R mysql mysql/
[root@centos3 local]# chgrp -R mysql mysql/

5.修改mysql.server.文件并复制到 /etc/init.d/目录下

[root@centos3 local]# cd /usr/local/mysql/support-files/
[root@centos3 support-files]# vi mysql.server

[root@centos3 support-files]# cp mysql.server /etc/init.d/mysqld

6.设置开机启动

[root@centos3 support-files]# chmod +x /etc/init.d/mysqld
[root@centos3 support-files]# chkconfig --add mysqld
[root@centos3 support-files]# chkconfig mysqld on

//查看开机启动是否成功

[root@centos3 support-files]# chkconfig --list mysqld

7.编辑my.cnf

###修改/etc/my.cnf中datadir的值和/usr/local/mysql/support-files/mysql.server中的datadir的值一样

[root@centos3 support-files]# vi /etc/my.cnf

8.为/etc/my.cnf中socket创建目录 和log-error创建目录及文件并修改用户和组

[root@centos3 local]# mkdir /var/run/mariadb

[root@centos3 local]# chown -R mysql /var/run/mariadb
[root@centos3 local]# chgrp -R mysql /var/run/mariadb

[root@centos3 local]# mkdir /var/log/mariadb

[root@centos3 local]# touch /var/log/mariadb/mariadb.log

[root@centos3 local]# chown -R mysql /var/log/mariadb
[root@centos3 local]# chgrp -R mysql /var/log/mariadb

[root@centos3 local]# mkdir /var/lib/mysql

[root@centos3 local]# chown -R mysql /var/lib/mysql

[root@centos3 local]# chgrp -R mysql /var/lib/mysql

9.初始化并记住最后的12位密码

[root@centos3 local]#  /usr/local/mysql/bin/mysqld --initialize --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/ --lc_messages_dir=/usr/local/mysql/share --lc_messages=zh_CN

10.启动服务

[root@centos3 support-files]# /etc/init.d/mysqld start
[root@centos3 support-files]# service mysql start

11.为/etc/my.cnf中socket文件创建软连接

[root@centos3 support-files]# ln -s /var/lib/mysql/mysql.sock /tmp/

12.登录修改密码，密码就是第9步系统生成的

[root@centos3 support-files]# mysql -uroot -p

mysql> set password=password("1234");