tar包解压安装

一、检查环境

  #卸载系统自带的Mariadb  [root@Meng ~]# rpm -qa|grep mariadb  mariadb-libs-5.5.44-2.el7.centos.x86_64  [root@Meng ~]# rpm -e --nodeps mariadb-libs-5.5.44-2.el7.centos.x86_64    #删除etc目录下的my.cnf文件    [root@Meng ~]# rm /etc/my.cnf  rm: cannot remove etc/my.cnf No such file or directory    #检查mysql是否存在  [root@Meng ~]# rpm -qa | grep mysql  [root@Meng ~]#     #检查mysql组和用户是否存在，如无创建  [root@Meng ~]# cat /etc/group | grep mysql   [root@Meng ~]#  cat /etc/passwd | grep mysql    #创建mysql用户组  [root@Meng ~]# groupadd mysql  #创建一个用户名为mysql的用户并加入mysql用户组  [root@Meng ~]# useradd -g mysql mysql  #制定password 为222222  [root@Meng ~]# passwd mysql  Changing password for user mysql.  New password:   BAD PASSWORD: The password is a palindrome  Retype new password:   passwd: all authentication tokens updated successfully.    #安装到/usr/local  [root@Meng local]# wget https://cdn.mysql.com//Downloads/mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz  [root@Meng local]# tar -zxvf mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz  [root@Meng local]# mv mysql-5.7.23-linux-glibc2.12-x86_64.tar.gz/ mysql    #更改所属的组和用户  [root@Meng local]# chown -R mysql mysql/  [root@Meng local]# chgrp -R mysql mysql/  [root@Meng local]# cd mysql/    [root@Meng mysql]# mkdir data    [root@Meng mysql]# chown -R mysql:mysql data

二、配置文件

  [root@Meng mysql]# vim my.cnf

  [mysql]  # 设置mysql客户端默认字符集  default-character-set=utf8   [mysqld]  skip-name-resolve  #设置3306端口  port = 3306   # 设置mysql的安装目录  basedir=/usr/lcoal/mysql  # 设置mysql数据库的数据的存放目录  datadir=/usr/lcoal/mysql/data  # 允许最大连接数  max_connections=200  # 服务端使用的字符集默认为8比特编码的latin1字符集  character-set-server=utf8  # 创建新表时将使用的默认存储引擎  default-storage-engine=INNODB   lower_case_table_names=1  max_allowed_packet=16M

点击Esc，输入：wq 保存并退出！

三、安装和初始化

  [root@Meng mysql]# bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data/

  [root@Meng mysql]# cp ./support-files/mysql.server /etc/init.d/mysqld  [root@Meng mysql]# chown 777 /etc/my.cnf   [root@Meng mysql]# chmod +x /etc/init.d/mysqld

  [root@Meng mysql]# /etc/init.d/mysqld restart  Shutting down MySQL.. SUCCESS!   Starting MySQL. SUCCESS!     #设置开机启动    [root@Meng mysql]# chkconfig --level 35 mysqld on  [root@Meng mysql]# chkconfig --list mysqld    [root@Meng mysql]# chmod +x /etc/rc.d/init.d/mysqld  [root@Meng mysql]# chkconfig --add mysqld  [root@Meng mysql]# chkconfig --list mysqld  [root@Meng mysql]# service mysqld status   SUCCESS! MySQL running (6666)

四、配置环境变量

  [root@Meng ~]#vim /etc/profile

一定要配置好！！！

不然会出现已安装 MySQL，但执行 mysql 命令提示命令找不到的问题！

五、登陆数据库

1、获得初始密码

  [root@Meng bin]# cat /root/.mysql_secret  

2、修改密码

  [root@Meng mysql]# mysql -uroot -p  Enter password:   Welcome to the MySQL monitor.  Commands end with ; or g.  Your MySQL connection id is 3  Server version: 5.7.23    Copyright (c) 2000, 2018, Oracle and/or its affiliates. All rights reserved.    Oracle is a registered trademark of Oracle Corporation and/or its  affiliates. Other names may be trademarks of their respective  owners.    Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.    mysql> set PASSWORD = PASSWORD('meng_2018');  Query OK, 0 rows affected, 1 warning (0.00 sec)    mysql> flush privileges;  Query OK, 0 rows affected (0.00 sec)

3、添加远程访问权限

  mysql> use mysql  Reading table information for completion of table and column names  You can turn off this feature to get a quicker startup with -A    Database changed  mysql> update user set host='%' where user='root';  Query OK, 1 row affected (0.00 sec)  Rows matched: 1  Changed: 1  Warnings: 0    mysql> select host,user from user;  +-----------+---------------+  | host      | user          |  +-----------+---------------+  | %         | root          |  | localhost | mysql.session |  | localhost | mysql.sys     |  +-----------+---------------+  3 rows in set (0.00 sec)    create user 'xxx'@'%' identified by '123';  这里 @‘%’ 表示在任何主机都可以登录

4、重启生效

  mysql> quit  Bye  [root@Meng mysql]# /etc/init.d/mysqld restart   Shutting down MySQL.. SUCCESS!   Starting MySQL. SUCCESS! 

5、在任何目录下可以登录mysql

  [root@Meng mysql]# ln -s /usr/local/mysql/bin/mysql   /usr/bin/mysql

自己安装了半天，最终才安装成功！第一开始是用的yum安装方式，但是总出现问题，最终选择的压缩包的方式，以此记录，愿大家顺利安装！