linux重設mysql root密碼的6種方法

shell指令碼重啟mysql密碼

注:記得給此指令碼屬於執行許可權哦。(chmod u+x reset_mysql_root_password.sh)

此shell指令碼如下:

代碼如下

複製代碼

#!/bin/bash PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin export PATH # Check if user is root if [ $(id -u) != "0" ]; then     printf "Error: You must be root to run this script!＼n"     exit 1 fi echo "=========================================================================＼n" printf "Reset MySQL root Password for LNMP  ,  Written by Licess ＼n" printf "=========================================================================＼n" printf "LNMP is a tool to auto-compile & install Nginx+MySQL+PHP on Linux ＼n" printf "This script is a tool to reset mysql root password for lnmp ＼n" printf "For more information please visit http://www.111cn.net ＼n" printf "＼n" printf "Usage: sh reset_mysql_root_password.sh＼n" printf "=========================================================================＼n" mysql_root_password="" read -p "(Please input New MySQL root password):" mysql_root_password if [ "$mysql_root_password" = "" ]; then echo "Error: Password can't be NULL!!＼n" exit 1 fi printf "Stoping MySQL...＼n" /etc/init.d/mysql stop printf "Starting MySQL with skip grant tables＼n" /usr/local/mysql/bin/mysqld_safe --skip-grant-tables >/dev/null 2>&1 & printf "using mysql to flush privileges and reset password＼n" sleep 10 printf "update user set password = Password('$mysql_root_password') where User = 'root'＼n" /usr/local/mysql/bin/mysql -u root mysql << EOF update user set password = Password('$mysql_root_password') where User = 'root'; EOF reset_status=`echo $?` if [ $reset_status = "0" ]; then printf "Password reset succesfully. Now killing mysqld softly＼n" killall mysqld sleep 10 printf "Restarting the actual mysql service＼n" /etc/init.d/mysql start printf "Password successfully reset to '$mysql_root_password'＼n" else printf "Reset MySQL root password failed!＼n" fi

方法二，利用root管理員來操作

系統管理員root進入shell

代碼如下	複製代碼
#service mysqld stop #mysqld_safe –skip-grant-tables & (我的mysqld_safe在/usr/bin，如果你的mysqld_safe不在PATH路徑裡面，那麼這裡要使用絕對路徑) 這個時候root的密碼為空白,我們就可以免認證登入了 #mysql -u root >

方法三、使用mysqladmin
 

代碼如下	複製代碼
# ./mysqladmin -u root password 'newpassword' # ./mysqladmin -u root -h host_name password 'newpassword' Usually mysqladmin's path is /usr/bin, host_name is your real host name, e.g. localhost.localdomain. password後面的引號不是必須的，不過如果密碼包含空格或者一些特殊的符號，需要用引號。

方法四、利用mysql SET PASSWORD命令
 

代碼如下	複製代碼
# ./mysql -u root mysql> SET PASSWORD FOR 'root'@'localhost' = PASSWORD('newpassword'); mysql> SET PASSWORD FOR 'root'@'host_name' = PASSWORD('newpassword');

方法五、使用UPDATE語句更新user表重設ROOT密碼
 

代碼如下	複製代碼
# ./mysql -u root mysql> UPDATE mysql.user SET Password = PASSWORD('newpassword') WHERE User = 'root'; mysql> FLUSH PRIVILEGES;

方法六、啟動MYSQL的安全模式重設ROOT密碼

代碼如下

複製代碼

1、停止MySQL進程 執行：/etc/init.d/mysql stop，具體位置可能隨系統不同而不同，也可能是/etc/init.d/mysql，/etc/init.d/mysqld等路徑，或下面直接終止（最好不要使用下面這個強制語句）：  # killall -TERM mysqld 2、以安全模式啟動MySQL   # mysqld_safe –skip-grant-tables & 或， # mysqld_safe --skip-grant-tables >/dev/null 2>&1 & 提示：mysqld_safe一般在/usr/local/mysql/bin/目錄下。 3、登陸MYSQL 完成上述兩步以後就可以不用密碼進入MySQL了   # mysql -u root 或， # /usr/local/mysql/bin/mysql -u root mysql 4、更改ROOT密碼 以下幾句依次執行：   use mysql; select host, user, password from user; update user set password=password(“newpassword”) where user=”root” flush privileges; 5.退出控制台，重啟MYSQL服務 service mysqld restart 或， /etc/init.d/mysql restart