# Find linux comes with the database
rpm -qa | grep mariadb
# Delete database comes with MariaDB
RPM -e - nodeps MariaDB-libs-5.5.56-2.el7.x86_64
#依次安装
rpm -ivh mysql-community-common-5.7.24-1.el7.x86_64.rpm
rpm -ivh mysql-community-libs-5.7.24-1.el7.x86_64.rpm
rpm -ivh mysql-community-client-5.7.24-1.el7.x86_64.rpm
rpm -ivh mysql-community-server-5.7.24-1.el7.x86_64.rpm
ps：
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这里出现的错误
# error: Failed dependencies:
/usr/bin/perl is needed by mysql-community-server-5.7.24-1.el7.x86_64
net-tools is needed by mysql-community-server-5.7.24-1.el7.x86_64
perl(Getopt::Long) is needed by mysql-community-server-5.7.24-1.el7.x86_64
perl(strict) is needed by mysql-community-server-5.7.24-1.el7.x86_64
解决方法：
$ yum install -y perl-Module-Install.noarch
# error: Failed dependencies:
net-tools is needed by mysql-community-server-5.7.24-1.el7.x86_64
解决方法：
$ yum install net-tools
# error: Failed dependencies: \
libnuma.so.1()(64bit) is needed by mysql-community-server-5.7.19-1.el6.x86_64 \
libnuma.so.1(libnuma_1.1)(64bit) is needed by mysql-community-server-5.7.19-1.el6.x86_64 \
libnuma.so.1(libnuma_1.2)(64bit) is needed by mysql-community-server-5.7.19-1.el6.x86_64
解决方法：
$ yum install -y numactl
-------------------------------------------------- -------------------
after installation, MySQL MySQL configuration file or the command to check whether there is in the / usr / bin
#mysql configuration file
$ LS /etc/my.cnf
# MySQL command
$ cd / usr / bin /
$ LS | grep MySQL
# start mysqld
Service Start mysqld
$ PS EF | grep mysqld
#password
$)(^bell521Z
#mysql configuration
CAT /etc/my.cnf
#mysql log file is password
grep 'password' /var/log/mysqld.log
# ------------------------------------------------- -------------------
# reset the password
# View validata_password plug-in
show global variables like '% validate% ';
# Validate_password_policy- wherein the password strength check on grade:
# 0 / the LOW> only check length.
# 1 / MEDIUM> inspection length, number, case, special characters.
# 2 / STRONG> to check the length, number, case, special characters, the dictionary file.
set global validate_password_policy = 0;
#validate_password_length> minimum password length.
set global validate_password_length = 1;
# Set the password
set password = password ( '123456' );
After the group by using the # mysql5.7 will only_full_group_by, need to finally add the following command in the file /etc/my.cnf
sql_mode = STRICT_TRANS_TABLES, NO_ZERO_IN_DATE, NO_ZERO_DATE, ERROR_FOR_DIVISION_BY_ZERO, NO_AUTO_CREATE_USER, NO_ENGINE_SUBSTITUTION
