系统运维
为了演示,找个测试环境来操作,千万不要线上这么搞
pkill mysqld 关闭掉Mysql
跳过MYSQL的权限表启动MySQL服务:
–skip-grant-tables启动mysql
/usr/local/mysql8013/bin/mysqld_safe --defaults-file=/data/mysql8/my8.cnf --skip-grant-tables &
将密码置空:
root@localhost [(none)]>update mysql.user set authentication_string=\\\'\\\' where user=root and host=localhost;
Query OK, 1 row affected (0.06 sec)
Rows matched: 1 Changed: 1 Warnings: 0
root@localhost [(none)]>
pkill mysqld 关闭掉mysql
再次启动mysql服务
[root@localhost ~]# /usr/local/mysql8013/bin/mysqld --defaults-file=/data/mysql8/my8.cnf &
无密码登录MySQL服务并设置新的密码:
root@localhost [(none)]>select version();
-----------
| version() |
-----------
| 8.0.13 |
-----------
root@localhost [(none)]>alter user user() identified by \\\'jist558@wei\\\';
[root@localhost ~]# mysql -uroot -p\\\’jist558@wei\\\’ -e "select version();"
mysql: [Warning] Using a password on the command line interface can be insecure.
———–
| version() |
———–
| 8.0.13 |
———–
密码写入.my.cnf文件就可以mysql直接登录mysql窗口:
[root@localhost ~]# cat .my.cnf
[mysql]
prompt=\\\\u@\\\\h:\\\\p \\\\R:\\\\m:\\\\s[\\\\d]>
no-auto-rehash
user=root
password=jist558@wei
[root@localhost ~]# mysql -e select version();
-----------
| version() |
-----------
| 8.0.13 |
-----------
演示完毕
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