[root@vm172--- data]# mysqladmin -uroot password "linux@123"

mysqladmin: connect to server at 'localhost' failed

error: 'Access denied for user 'root'@'localhost' (using password: NO)'

[root@vm172--- ~]# systemctl stop mysqld.service

[root@vm172--- mysql]# mysqld_safe --skip-grant-tables &

[]

[root@vm172--- mysql]#  :: mysqld_safe Logging to '/var/log/mysqld.log'.

 :: mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql

[root@vm172--- mysql]# mysql -uroot -p

Enter password:

Welcome to the MySQL monitor.  Commands end with ; or \g.

Your MySQL connection id is

Server version: 5.6.-log MySQL Community Server (GPL)

Copyright (c) , , 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> use mysql;

Database changed

mysql> update user set password=password("linux@123") where user='root' and host='localhost';

Query OK,  row affected (0.00 sec)

Rows matched:   Changed:   Warnings: 

mysql> flush privileges;

Query OK,  rows affected (0.00 sec)

mysql> quit

Bye

[root@vm172--- mysql]# mysql -uroot -plinux@

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

Server version: 5.6.-log MySQL Community Server (GPL)

Copyright (c) , , 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>

[root@vm172--- ~]# service mysqld start

[root@vm172--- ~]# ps -ef|grep mysql

root         : pts/    :: tail -f -n  /var/log/mysqld.log

mysql            : ?        :: /bin/sh /usr/bin/mysqld_safe --basedir=/usr

mysql        : ?        :: /usr/sbin/mysqld --basedir=/usr --datadir=/var/lib/mysql --plugin-dir=/usr/lib64/mysql/plugin --log-error=/var/log/mysqld.log --pid-file=/var/run/mysqld/mysqld.pid --socket=/var/lib/mysql/mysql.sock

root         : pts/    :: grep --color=auto mysql

[root@vm172--- ~]# netstat -lntup|grep

tcp               0.0.0.0:            0.0.0.0:*               LISTEN      /mysqld