linux centOS7安装mysql5.7

1. 下载tar包，这里使用wget从官网下载

   wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

    

2. 将mysql安装到/usr/local/mysql下

   # 解压

   tar -zxvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

   # 移动

   mv mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/

   # 重命名

   mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql

    

3. 新建data目录

   mkdir /usr/local/mysql/data

    

4. 新建mysql用户、mysql用户组

   # mysql用户组

   groupadd mysql

   # mysql用户

   useradd mysql -g mysql

    

5. 将/usr/local/mysql的所有者及所属组改为mysql

   chown -R mysql.mysql /usr/local/mysql

    

6. 配置

   /usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data

   # 如果出现以下错误：

   [WARNING] mysql_install_db is deprecated. Please consider switching to mysqld --initialize
   [ERROR]   Child process: /usr/local/mysql/bin/mysqldterminated prematurely with errno= 32
   [ERROR]   Failed to execute /usr/local/mysql/bin/mysqld --bootstrap --datadir=/usr/local/mysql/data --lc-messages-dir=/usr/local/mysql/share --lc-messages=en_US --basedir=/usr/local/mysql
   -- server log begin --
   
   -- server log end --

   # 则使用以下命令：

   /usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

   # 如果出现以下错误：

   /usr/local/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory

   # 则执行以下命令：

   yum -y install numactl

   # 完成后继续安装：

   /usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

   # 编辑/etc/my.cnf：

   vi /etc/my.cnf

   [mysqld]
   datadir=/usr/local/mysql/data
   basedir=/usr/local/mysql
   socket=/tmp/mysql.sock
   user=mysql
   port=3306
   character-set-server=utf8
   # 取消密码验证
   skip-grant-tables
   # Disabling symbolic-links is recommended to prevent assorted security risks
   symbolic-links=0
   # skip-grant-tables
   [mysqld_safe]
   log-error=/var/log/mysqld.log
   pid-file=/var/run/mysqld/mysqld.pid

     

7. 开启服务

   # 将mysql加入服务

   cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

   # 开机自启

   chkconfig mysql on

   # 开启

   service mysql start

    

8. 添加快捷方式

   ln -s /usr/local/mysql/bin/mysql /usr/bin

    

9. 设置密码

   # 登录（由于/etc/my.cnf中设置了取消密码验证，所以此处密码任意）

   mysql -u root -p

   # 操作mysql数据库

   use mysql;

   # 修改密码

   update user set authentication_string=password('你的密码') where user='root';
   
   flush privileges;
   
   exit;

    

10. 将/etc/my.cnf中的skip-grant-tables删除

    vi /etc/my.cnf

    [mysqld]
    datadir=/usr/local/mysql/data
    basedir=/usr/local/mysql
    socket=/tmp/mysql.sock
    user=mysql
    port=3306
    character-set-server=utf8
    # 取消密码验证
    #skip-grant-tables
    # Disabling symbolic-links is recommended to prevent assorted security risks
    symbolic-links=0
    # skip-grant-tables
    [mysqld_safe]
    log-error=/var/log/mysqld.log
    pid-file=/var/run/mysqld/mysqld.pid

     

11. 登录再次设置密码

    mysql -u root -p
    
    ALTER USER 'root'@'localhost' IDENTIFIED BY '修改后的密码';
    
    exit;

     

12. 允许远程连接

    mysql -u root -p
    
    use mysql;
    
    update user set host='%' where user = 'root';
    
    flush privileges;
    
    exit;