mysqladmin -u root -p password 123456 mysqladmin -u用户名 -p旧密码 password 新密码

chown -R mysql:mysql /var/lib/mysql  /etc/init.d/mysql stop 或 kill -9 杀死进程。 [root@corshetlpro01 bin]# cd /usr/local/mysql/bin ./mysqld_safe --user=mysql --skip-grant-tables --skip-networking & [root@corshetlpro01 bin]# ps -ef | grep mysql root     26544 25356  0 15:08 pts/18   00:00:00 /bin/sh ./mysqld_safe --user=mysql --skip-grant-tables --skip-networking mysql    26673 26544  0 15:08 pts/18   00:00:00 /usr/local/mysql/libexec/mysqld --basedir=/usr/local/mysql --datadir=/var/lib/mysql --user=mysql --skip-grant-tables --skip-networking --log-error=/var/lib/mysql/corshetlpro01.err --pid-file=/var/lib/mysql/corshetlpro01.pid --socket=/tmp/mysql.sock --port=3306 root     27223 25356  0 15:08 pts/18   00:00:00 grep mysql ./mysql -u root mysql> use mysql; mysql> update user set password=password('newpassword') where user='root'; mysql> flush privileges; mysql> quit # /etc/init.d/mysql restart # mysql -uroot -p enter password: <输入新设的密码newpassword>