# rpm -qa | grep -i mysql# rpm -ev mysql-libs-* --nodeps

# rpm -ivh mysql-community-common-5.7.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-libs-5.7.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-client-5.7.17-1.el7.x86_64.rpm
# rpm -ivh mysql-community-server-5.7.17-1.el7.x86_64.rpm

# service mysqld start
# service mysqld stop
# service mysqld status

# cat /var/log/mysqld.log | more

# mysql -uroot -pmysql> set password='Pwd@123456';
mysql> grant all privileges on *.* to 'root'@'%' identified by 'Pwd@123456';

mysql> set global validate_password_policy=0;

# mkdir /data/mysql/data
# mv /var/lib/mysql/* /data/mysql/data/
# mkdir /data/mysql/log
# chown mysql:mysql -R /data/mysql
# touch mysqld_safe.log
# chown mysql:mysql mysqld_safe.log
# vi /etc/my.cnf
/**
[client]
port = 3306
socket = /data/mysql/log/mysql.sock
default-character-set=utf8[mysql]
no-auto-rehash
socket=/data/mysql/log/mysql.sock
default-character-set=utf8[mysqld]
port = 3306
socket = /data/mysql/log/mysql.sock
character-set-server=utf8
lower_case_table_names=1
basedir=/usr
datadir=/data/mysql/data
log-error=/data/mysql/log/error.log
pid-file=/data/mysql/log/mysql.pid
init_connect='SET NAMES utf8'
symbolic-links=0skip-external-locking
key_buffer_size = 16M
max_allowed_packet = 1M
table_open_cache = 64
sort_buffer_size = 512K
net_buffer_length = 8K
read_buffer_size = 256K
read_rnd_buffer_size = 512K
myisam_sort_buffer_size = 8M[mysqld_safe]
log-error=/data/mysql/log/mysqld_safe.log
*/
# getenforce
Enforcing
# setenforce 0
# vi /etc/selinux/config
/**
# This file controls the state of SELinux on the system.
# SELINUX= can take one of these three values:
#     enforcing - SELinux security policy is enforced.
#     permissive - SELinux prints warnings instead of enforcing.
#     disabled - No SELinux policy is loaded.
#SELINUX=enforcing
SELINUX=disabled
# SELINUXTYPE= can take one of these two values:
#     targeted - Targeted processes are protected,
#     mls - Multi Level Security protection.
SELINUXTYPE=targeted
*/
# service mysqld start

# mysqladmin -u root -p password
mysql> select version();# chkconfig --list
# chkconfig --level 345 mysqld on
# netstat -na | grep 3306

mysql> CREATE USER 'username'@'host' IDENTIFIED BY 'password';

# service mysqld --initedializeUsage: /etc/init.d/mysqld {start|stop|status|restart|condrestart|try-restart|reload|force-reload}# service mysqld startInitializing MySQL database:                               [  OK  ]Installing validate password plugin:                       [  OK  ]Starting mysqld:                                           [  OK  ]