MySQL-5.6.42版本二进制升级5.7.20版本

#启动数据库 创建一个数据库 查看
[root@db02 ~]# systemctl start mysqld
[root@db02 ~]#  mysql -e "create database old charset utf8mb4;"
[root@db02 ~]# mysql -e "show databases;"

[root@db02 ~]# wget https://downloads.mysql.com/archives/get/p/23/file/mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz
#解压
[root@db02 ~]#  tar xf mysql-5.7.20-linux-glibc2.12-x86_64.tar.gz
#移动到指定目录
[root@db02 ~]# mv mysql-5.7.20-linux-glibc2.12-x86_64 /service/mysql-5.7.20

[root@db02 ~]# systemctl stop mysqld

[root@db02 ~]# rm -rf /service/mysql

[root@db02 ~]# ln -s /service/mysql-5.7.20 /service/mysql

[root@db02 ~]# cp -a /service/mysql-5.6.42/data /service/mysql-5.7.20/
[root@db02 ~]# chown -R mysql.mysql /service/mysql-5.7.20

[root@db02 ~]# systemctl start mysqld
[root@db02 ~]# mysql_upgrade

[root@db02 ~]# systemctl restart mysqld

[root@db02 ~]# mysql -e "select @@version;"
[root@db02 ~]# mysql -e "show databases"