mysql破解root密码

#设置免密登录
echo skip-grant-tables >> /etc/my.cnf
systemctl restart mysqld

#设置密码为空
mysql -e'use mysql;update user set authentication_string="" where user="root";' --connect-expired-password
mysql -e'use mysql;select authentication_string from user where user="root";'  ###验证###

#设置密码登录（但此时实际密码为空）
sed -i 's/^skip-grant-tables//' /etc/my.cnf
systemctl restart mysqld

#修改密码
mysql -e'alter user root@localhost identified by "Admin@123!";' --connect-expired-password  #密码为空时，需要--connect-expired-password才能使用-e在命令行交互。
#echo sql_mode=$(mysql -uroot -pAdmin@123! -e'select @@sql_mode;' | tail -1 | sed 's/ONLY_FULL_GROUP_BY,//') >> /etc/my.cnf #设置only full group by，视自己需求
systemctl restart mysqld

#mysql -uroot -pAdmin@123! -e'show databases'#测试登录

#附：python改密码示例

import pymysql os

#设置免密
os.system(echo "skip-grant-tables" /etc/my.cnf')
os.system('service mysqld restart')

#连接mysql，设置密码为空
con = pymysql.connect(host='localhost',user='root',database='mysql') 
cursor.execute('update user set authentication_string="" where user="root"') 
con.commit() 
con.close()

#启用密码登录
os.system('sed -i "s/^skip-grant-tables//" /etc/my.cnf')
os.system('service mysqld restart')

#修改密码
con = pymysql.connect(host='localhost',user='root',database='mysql')
cursor = con.cursor()
cursor.execute('alter user root@localhost identified by "Admin@123!"')
con.commit()
con.close()

#密码验证，输出为mysql版本
#con = pymysql.connect(host='localhost',user='root',password='Admin@123!',database='mysql',port=3306)
#cursor = con.cursor() 
#data = cursor.fetchone() 
#print ("Database version : %s " % data) 
#con.close()