Linux 安装mysql心得

第一步：mysql安装包准备

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mysql官网下载地址：https://downloads.mysql.com/
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第二步：将mysql安装包上传到服务器

第三步：解压 tar -zxvf mysql-5.7.30-linux-glibc2.12-x86_64.tar.gz 第四步：cp或mv到/usr/local/目录下，并命名为mysql

注意：这里不建议使用拷贝（cp），因为文件大的话就会很慢

mv mysql-5.7.30-linux-glibc2.12-x86_64 /usr/local/mysql 第五步：创建mysql用户组和用户 groupadd mysql useradd -r -g mysql mysql 第六步：创建mysql配置存放目录data cd /usr/local/mysql mkdir data 第七步：为mysql目录修改用户权限 chown -R mysql:mysql /usr/local/mysql/ 第八步：将mysql初始化，并记录初始密码(Bo39?ed2h*W1) cd msyql/bin ./mysqld --initialize --user=mysql --basedir=http://www.likecs.com/usr/local/mysql --datadir=http://www.likecs.com/usr/local/mysql/data

会出现以下：

2021-01-30T03:51:20.337410Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details). 2021-01-30T03:51:21.458335Z 0 [Warning] InnoDB: New log files created, LSN=45790 2021-01-30T03:51:21.659739Z 0 [Warning] InnoDB: Creating foreign key constraint system tables. 2021-01-30T03:51:21.722351Z 0 [Warning] No existing UUID has been found, so we assume that this is the first time that this server has been started. Generating a new UUID: 6a99bae9-62ae-11eb-8966-00163e175cc4. 2021-01-30T03:51:21.724337Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened. 2021-01-30T03:51:22.941639Z 0 [Warning] CA certificate ca.pem is self signed. 2021-01-30T03:51:22.977097Z 1 [Note] A temporary password is generated for root@localhost: Bo39?ed2h*W1 第九步：配置mysql（my.cnf） vim /etc/my.cnf [mysqld] basedir=http://www.likecs.com/usr/local/mysql datadir=http://www.likecs.com/usr/local/mysql/data #skip-grant-tables port = 3306 pid-file = /usr/local/mysql/data/mysql.pid socket = /usr/local/mysql/data/mysql.sock sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES default_authentication_plugin = mysql_native_password 第十步：加入开机自启 cd /usr/local/mysql cp support-files/mysql.server /etc/init.d/mysql chmod +x /etc/init.d/mysql //添加可执行权限 chkconfig --add mysql // 添加开机自启 chkconfig --list //查看自启是否添加成功

第十一步：配置环境变量 vim /etc/profile export PATH=$PATH:/usr/local/mysql/bin:/usr/local/mysql/lib source /etc/profile 第十二步：启动mysql systemctl restart mysql 第十三步：登录mysql mysql -u root -pBo39?ed2h*W1 //初始化密码

会出现以下错误（说是要改一下/tmp/mysql.sock目录）：

vim /etc/my.cnf socket = /tmp/mysql.sock systemctl restart mysql //再重启服务

再次登录：（mysql -u root -pBo39?ed2h*W1）

修改密码

alter user 'root'@'localhost' identified with mysql_native_password by '123456'; 或 set password for root@localhost= password(‘123456’); flush privileges;