作者：王丽珠景平怡伦_621 | 来源：互联网 | 2023-08-31 21:14
环境:虚拟机+CentOS 7
wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# tar zxvf mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# ls
index.html?id=471614 mysql-5.7.19-linux-glibc2.12-x86_64 mysql-5.7.19-linux-glibc2.12-x86_64.tar.gz
[root@beta src]# mv mysql-5.7.19-linux-glibc2.12-x86_64 /usr/local/mysql
[root@beta mysql]# useradd -M -s /sbin/nologin mysql
[root@beta mysql]# ls
bin COPYING docs include lib man README share support-files
[root@beta mysql]# mkdir -p /usr/local/mysql/data/mysql
[root@beta mysql]# chown mysql /usr/local/mysql/data/mysql
下面这步注意最后一句：
[root@beta mysql]# ./bin/mysqld --initialize --user=mysql --datadir=/usr/local/mysql/data/mysql
2017-09-27T03:44:47.999985Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_for_timestamp server option (see documentation for more details).
2017-09-27T03:44:49.011240Z 0 [Warning] InnoDB: New log files created, LSN=45790
2017-09-27T03:44:49.180334Z 0 [Warning] InnoDB: Creating foreign key constraint system tables.
2017-09-27T03:44:49.245777Z 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: 3649ce8c-a336-11e7-a43f-000c292b2832.
2017-09-27T03:44:49.266053Z 0 [Warning] Gtid table is not ready to be used. Table 'mysql.gtid_executed' cannot be opened.
2017-09-27T03:44:49.268172Z 1 [Note] A temporary password is generated for root@localhost: ADB&yGx-d8ab
接着执行：
[root@beta mysql]# ./bin/mysql_ssl_rsa_setup --datadir=usr/local/mysql/data/mysql
Generating a 2048 bit RSA private key
......................+++
...+++
writing new private key to 'ca-key.pem'
-----
Generating a 2048 bit RSA private key
.........................+++
...............................................................................+++
writing new private key to 'server-key.pem'
-----
Generating a 2048 bit RSA private key
....................+++
.......................+++
writing new private key to 'client-key.pem'
-
先检查是否有/etc/my.cnf,如果没有
cp support-files/my-default.cnf /etc/my.cnf
编辑/etc/my.cnf,重点修改下面几个，其他的尽量注释掉：
basedir = /usr/local/mysql
datadir =
socket = /tmp/mysql.sock
2.启动脚本
cp support-files/mysql.server /etc/init.d/mysqld
编辑/etc/init.d/mysqld，只修改下面几个：
basedir=/usr/local/mysql
datadir=/data/mysql
将/etc/init.d/mysqld加入启动项：
[root@beta mysql]# chkconfig --add mysqld
[root@beta mysql]# chkconfig --list
注意：该输出结果只显示 SysV 服务，并不包含原生 systemd 服务。SysV 配置数据可能被原生 systemd 配置覆盖。
如果您想列出 systemd 服务,请执行 'systemctl list-unit-files'。
欲查看对特定 target 启用的服务请执行
'systemctl list-dependencies [target]'。
mysqld 0:关 1:关 2:开 3:开 4:开 5:开 6:关
netconsole 0:关 1:关 2:关 3:关 4:关 5:关 6:关
network 0:关 1:关 2:开 3:开 4:开 5:开 6:关
-
用初始密码登陆（见上面第3步）
/usr/local/mysql/bin/mysql -uroot -p‘初始密码’ #-p和’’不能隔开
出现mysql>的时候，输入set password = password('新密码')；
退出，用新密码登陆
2. 忘记初始密码
给/etc/my.cnf/[mysqld]下面增加一行skip-grant-tables,重启 mysqld：/etc/init.d/mysqld restart
[mysqld]
skip-grant-tables
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data/mysql
socket=/tmp/mysql.sock
[root@beta ~]# /etc/init.d/mysqld restart
Shutting down MySQL.. SUCCESS!
Starting MySQL.. SUCCESS!
重新登录 mysql：
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot
mysql>后输入：update mysql.user set authentication_string=password('123333') where user='root';
mysql> update mysql.user set authentication_string=password('123333') where user='root';
Query OK, 1 row affected, 1 warning (0.00 sec)
Rows matched: 1 Changed: 1 Warnings: 1
退出，删除 my.cnf 加入的skip-grant-tables，重启mysqld
新密码重新登录 mysql：
[root@beta ~]# /usr/local/mysql/bin/mysql -uroot -p'123333'
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or \g.
Your MySQL connection id is 13
Server version: 5.7.19 MySQL Community Server (GPL)
Copyright (c) 2000, 2017, 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>
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