1.linux6 x86-64 RPM包安装mysql5.7.20

1. 注意版本和此次更新时间 2017-12-03  版本：mysql-5.7.20-1.el6.x86_64  环境:linux6.x

2. ​官方下载地址:

   wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.20-1.el6.x86_64.rpm-bundle.tar

3. 解压:

   tar -xvf mysql-5.7.20-1.el6.x86_64.rpm-bundle.tar

4. 卸载之前的版本

   rpm -qa | grep -i mysql

   rpm -e xxxxx [之前安装的版本] --nodeps 要卸载的mysql版本

5. 按照步骤来安装就好

   1.rpm -ivh mysql-community-libs-5.7.20-1.el6.x86_64.rpm --nodeps --force

   2.rpm -ivh mysql-community-devel-5.7.20-1.el6.x86_64.rpm --nodeps --force

   3.rpm -ivh mysql-community-client-5.7.20-1.el6.x86_64.rpm  --nodeps --force

   4.rpm -ivh mysql-community-server-5.7.20-1.el6.x86_64.rpm  --nodeps --force

6. 修改密码 （有点特殊 ）

1.找到my.cnf |  本机  /etc/my.cnf

2.[mysqld]#下添加

skip-grant-tables=1 #不用验证

3.开启mysql /etc/init.d/mysqld start|本机默认地址

        4.进入并修改（依次命令）

​        1. mysql -uroot -p;

​        2.use mysql

​        3.update user set authentication_string = password('123456'), password_expired = 'N', password_last_changed = now() where user = 'root';

​     ​5.my.cnf |  本机  /etc/my.cnf 里面删除skip-grant-tables=1

    ​6.测试

​    mysql -uroot -p123456 -e "show databases;";

​7.OK收工;

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遇到的错误总结:

1.默认提示需要输入校验码

[root@xxxxxx tool]# rpm -ivh mysql-community-devel-5.7.20-1.el6.x86_64.rpm

warning: mysql-community-devel-5.7.20-1.el6.x86_64.rpm: Header V3 DSA/SHA1 Signature, key ID 5072e1f5: NOKEY

解决:(去掉校验安装)

rpm -ivh mysql-community-devel-5.7.20-1.el6.x86_64.rpm --nosignature

2.木有安装 mysql-community-libs-5.7.20-1.el6.x86_64.rpm

[root@xxxxxx tool]# rpm -ivh mysql-community-devel-5.7.20-1.el6.x86_64.rpm  --nosignature

error: Failed dependencies:

libmysqlclient.so.20()(64bit) is needed by mysql-community-devel-5.7.20-1.el6.x86_64

mysql-community-libs(x86-64) >= 5.7.9 is needed by mysql-community-devel-5.7.20-1.el6.x86_64

解决:

rpm -ivh mysql-community-libs-5.7.20-1.el6.x86_64.rpm  --nosignature

3.权限问题