阿里云部署web项目（二）——安装mysql，mysql操做命令

阿里云

 

 

使用root登陆

 

1.确保服务器系统处于最新状态

[root@localhost ~]# yum -y update

若是显示如下内容说明已经更新完成

Replaced:

  grub2.x86_64 1:2.02-0.64.el7.centos   grub2-tools.x86_64 1:2.02-0.64.el7.centos

Complete!

 

2.重启服务器

[root@localhost ~]# reboot

 

3.首先检查是否已经安装，若是已经安装先删除之前版本，以避免安装不成功

 

[root@localhost ~]# rpm -qa | gerp mysql

 

4.下载MySql安装包

[root@localhost ~]# rpm -ivh http://dev.mysql.com/get/mysql57-community-release-el7-8.noarch.rpm

或

[root@localhost ~]# rpm -ivh http://dev.mysql.com/get/mysql-community-release-el7-5.noarch.rpm

 

 

5.安装MySql

[root@localhost ~]# yum install -y mysql-server

或

[root@localhost ~]# yum install mysql-community-server

若是显示如下内容说明安装成功

Complete!

 

6.设置开机启动Mysql

[root@localhost ~]# systemctl enable mysqld.service

 

7.检查是否已经安装了开机自动启动

[root@localhost ~]# systemctl list-unit-files | grep mysqld

若是显示如下内容说明已经完成自动启动安装

mysqld.service                                enabled

 

8.设置开启服务

[root@localhost ~]# systemctl start mysqld.service

 

9.查看MySql默认密码

[root@localhost ~]# grep 'temporary password' /var/log/mysqld.log

 

10.登录MySql，输入用户名和密码

[root@localhost ~]# mysql -uroot -p

 

11.修改当前用户密码

mysql>SET PASSWORD = PASSWORD('Abc123!_');

 

12.开启远程登陆，受权root远程登陆

mysql>GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY 'a123456!' WITH GRANT OPTION;

 

13.命令当即执行生效

mysql>flush privileges;

 

 

 

 

 

其余功能:

 

# 检查而且显示Apache相关安装包

[root@localhost ~]# rpm -qa | grep mysql

 

# 删除MySql

[root@localhost ~]# yum remove -y mysql mysql mysql-server mysql-libs compat-mysql51

或

[root@localhost ~]# rpm -e mysql-community-libs-5.7.20-1.el7.x86_64 --nodeps

或

[root@localhost ~]# yum -y remove mysql-community-libs-5.7.20-1.el7.x86_64

 

# 查看MySql相关文件

[root@localhost ~]# find / -name mysql

 

# 重启MySql服务

[root@localhost ~]# service mysqld restart

 

# 查看MySql版本

[root@localhost ~]# yum repolist all | grep mysql

 

# 查看当前的启动的 MySQL 版本

[root@localhost ~]# yum repolist enabled | grep mysql

 

# 经过Yum来安装MySQL,会自动处理MySQL与其余组件的依赖关系

[root@localhost ~]# yum install mysql-community-server 

 

# 查看MySQL安装目录

[root@localhost ~]# whereis mysql

 

# 启动MySQL服务

[root@localhost ~]# systemctl start mysqld

 

# 查看MySQL服务状态

[root@localhost ~]# systemctl status mysqld

 

# 关闭MySQL服务

[root@localhost ~]# systemctl stop mysqld

 

# 测试MySQL是否安装成功

[root@localhost ~]# mysql

 

# 查看MySql默认密码

[root@localhost ~]# grep 'temporary password' /var/log/mysqld.log

 

# 查看全部数据库

mysql>show databases;

 

# 退出登陆数据库

mysql>exit;

 

# 查看全部数据库用户

mysql>SELECT DISTINCT CONCAT('User: ''',user,'''@''',host,''';') AS query FROM mysql.user;