linux系统 mysql 5.7.27安装

冷不防 2023-06-07 10:43 34阅读 0赞

1.下载mysql-5.7.27-linux-glibc2.12-x86\_64.tar.gz

[https://dev.mysql.com/downloads/mysql/5.7.html\#downloads][https_dev.mysql.com_downloads_mysql_5.7.html_downloads]

或者命令下载：wget https://cdn.mysql.com//Downloads/MySQL-5.7/mysql-5.7.27-linux-glibc2.12-x86\_64.tar.gz

2.安装前检查是否安装了mysql

rpm -qa | grep mysql

3.如过出现类似如下信息

mysql-libs-5.1.52-1.el6\_0.1.x86\_64

4.卸载  
rpm -e mysql-libs-5.1.52-1.el6\_0.1.x86\_64　　// 普通删除模式  
rpm -e --nodeps mysql-libs-5.1.52-1.el6\_0.1.x86\_64　　// 强力删除模式，如果使用上面命令删除时，提示有依赖的其它文件，则用该命令可以对其进行强力删除  
5.检查否存在 mariadb 数据库，如有，卸载同上

6.将下载好的mysql上传到指定目录

/opt/mysql

7.解压

tar -zxvf mysql-5.7.27-linux-glibc2.12-x86\_64.tar.gz

8.重命名

mv mysql-5.7.27-linux-glibc2.12-x86\_64.tar.gz mysql-5.7.27

9.检查mysql组和用户是否存在，如无创建

cat /etc/group | grep mysql
    #类似
    mysql:x:490:
    cat /etc/passwd | grep mysql
    #类似
    mysql:x:496:490::/home/mysql:/bin/bash

10.以上为存在的情况，如无，执行添加命令：

groupadd mysql
    useradd -r -g mysql mysql
     
    #useradd -r参数表示mysql用户是系统用户，不可用于登录系统

11.创建data目录

cd mysql-5.7.27
    mkdir data

12.将/opt/mysql/mysql-5.7.25的所有者及所属组改为mysql

chown -R mysql.mysql /opt/mysql/mysql-5.7.27

13.在/opt/mysql/mysql-5.7.25/support-files目录下创建my\_default.cnf

# For advice on how to change settings please see
    # http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html
    # *** DO NOT EDIT THIS FILE. It's a template which will be copied to the
    # *** default location during install, and will be replaced if you
    # *** upgrade to a newer version of MySQL.
     
     
    [mysqld]
    sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES 
     
    basedir = /opt/mysql/mysql-5.7.27
    datadir = /opt/mysql/mysql-5.7.27/data
    port = 3306
    socket = /tmp/mysql.sock
    character-set-server=utf8
     
    log-error = /opt/mysql/mysql-5.7.27/data/mysqld.log
    pid-file = /opt/mysql/mysql-5.7.27/data/mysqld.pid

14.拷贝，如果提示是否覆盖，y

cp support-files/my\_default.cnf /etc/my.cnf

15初始化 mysqld  
./bin/mysqld --initialize --user=mysql --basedir=/opt/mysql/mysql-5.7.27/ --datadir=/opt/mysql/mysql-5.7.27/data/   
16.若报错 mysqld: \[ERROR\] Found option without preceding group in config file /etc/my.cnf at line 1!

检查/etc/my.cnf文件是否复制的时候第一行没有复制完全

17.初始化完成之后，查看日志

/opt/mysql/mysql-5.7.27/data/mysqld.log

18.最后一行的临时密码

A temporary password is generated for root@localhost: 2I8\_DZ/WpaE%

19.把启动脚本放到开机初始化目录

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

20.启动mysql服务

service mysql start

21.登录mysql，密码为上述初始密码

./bin/mysql -u root -p

22.修改密码