centos7中安装mysql

1.新建组、新建用户


[root@ticent admin]# groupadd mysql



[root@ticent admin]# useradd -m -g mysql mysql


[root@ticent admin]# 

2.查看是否已经安装，如已经安装，需要先移除


[root@ticent admin]# rpm -qa | grep mysql


[root@ticent admin]# 

3.修改mysql用户密码


[root@ticent admin]# passwd mysql


4.下载


[mysql@ticent ~]$ wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-client-5.7.18-1.el7.x86_64.rpm



[mysql@ticent ~]$ wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-libs-5.7.18-1.el7.x86_64.rpm



[mysql@ticent ~]$ wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-common-5.7.18-1.el7.x86_64.rpm



[mysql@ticent ~]$ wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-community-server-5.7.18-1.el7.x86_64.rpm


[mysql@ticent ~]$ ll

总用量 157960

-rw-rw-r–. 1 mysql mysql  25079412 3月  20 17:40 mysql-community-client-5.7.18-1.el7.x86_64.rpm

-rw-rw-r–. 1 mysql mysql    277784 3月  20 17:40 mysql-community-common-5.7.18-1.el7.x86_64.rpm

-rw-rw-r–. 1 mysql mysql   2237888 3月  20 17:40 mysql-community-libs-5.7.18-1.el7.x86_64.rpm

-rw-rw-r–. 1 mysql mysql 128210634 6月   6 01:02 mysql-community-server-5.7.18-1.el7.x86_64.rpm

5.可以使用root用户安装，也可以使用mysql用户安装。若使用mysql，则需要先修改/etc/sudoers文件，如下，添加标记的内容。使用root则不需要设置。


[root@ticent admin]# vi /etc/sudoers

6.移除mariadb-libs


[mysql@ticent ~]$ sudo rpm -e mariadb-libs-5.5.52-1.el7.x86_64 –nodeps


7.安装perl


[root@ticent mysql]# yum install perl


8.安装mysql


[mysql@ticent ~]$ sudo rpm -ivh mysql-community-common-5.7.18-1.el7.x86_64.rpm 


警告：mysql-community-common-5.7.18-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY

准备中…                          ################################# [100%]

正在升级/安装…

   1:mysql-community-common-5.7.18-1.e################################# [100%]


[mysql@ticent ~]$ sudo rpm -ivh mysql-community-libs-5.7.18-1.el7.x86_64.rpm 


警告：mysql-community-libs-5.7.18-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY

准备中…                          ################################# [100%]

正在升级/安装…

   1:mysql-community-libs-5.7.18-1.el7################################# [100%]


[mysql@ticent ~]$ sudo rpm -ivh mysql-community-client-5.7.18-1.el7.x86_64.rpm 


警告：mysql-community-client-5.7.18-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY

准备中…                          ################################# [100%]

正在升级/安装…

   1:mysql-community-client-5.7.18-1.e################################# [100%]


[mysql@ticent ~]$ sudo rpm -ivh mysql-community-server-5.7.18-1.el7.x86_64.rpm 


警告：mysql-community-server-5.7.18-1.el7.x86_64.rpm: 头V3 DSA/SHA1 Signature, 密钥 ID 5072e1f5: NOKEY

准备中…                          ################################# [100%]

正在升级/安装…

   1:mysql-community-server-5.7.18-1.e################################# [100%]

9.初始化


[mysql@ticent ~]$ mysqld –initialize


10.启动服务


[mysql@ticent ~]$ service mysqld start


11.查看临时密码


[mysql@ticent ~]$ cat /var/log/mysqld.log

12.使用初始密码登录，修改密码


[mysql@ticent ~]$ mysql -u root -p



mysql> ALTER USER 'root'@'localhost' IDENTIFIED BY '123';

mysql> flush privileges;

13.再次登录验证成功