centos7-mysql5.7rpm安装

1、由于CentOS 的yum源中没有mysql，需要到mysql的官网下载yum repo配置文件。

下载命令：

wget https://dev.mysql.com/get/mysql57-community-release-el7-9.noarch.rpm
2、然后进行repo的安装：

rpm -ivh mysql57-community-release-el7-9.noarch.rpm

执行完成后会在/etc/yum.repos.d/目录下生成两个repo文件mysql-community.repo mysql-community-source.repo
二、使用yum命令即可完成安装

注意：必须进入到 /etc/yum.repos.d/目录后再执行以下脚本
1、安装命令：

yum install mysql-server
2、启动msyql：

systemctl start mysqld #启动MySQL
3、获取安装时的临时密码（在第一次登录时就是用这个密码）：

grep 'temporary password' /var/log/mysqld.log

三、登录：

mysql -u root -p

然后输入密码（刚刚获取的临时密码）

ALTER USER 'root'@'localhost' IDENTIFIED BY '@abcd123456';

2、关闭MySQL

systemctl stop mysqld
3、重启MySQL

systemctl restart mysqld
4、查看MySQL运行状态

systemctl status mysqld
5、设置开机启动

systemctl enable mysqld
6、关闭开机启动

systemctl disable mysqld

# For advice on how to change settings please see
# http://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html

[mysqld]
#
# Remove leading # and set to the amount of RAM for the most important data
# cache in MySQL. Start at 70% of total RAM for dedicated server, else 10%.
# innodb_buffer_pool_size = 128M
#
# Remove leading # to turn on a very important data integrity option: logging
# changes to the binary log between backups.
# log_bin
#
# Remove leading # to set options mainly useful for reporting servers.
# The server defaults are faster for transactions and fast SELECTs.
# Adjust sizes as needed, experiment to find the optimal values.
# join_buffer_size = 128M
# sort_buffer_size = 2M
# read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock

# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0

log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

character_set_server=utf8
init_connect='SET NAMES utf8'
max_connections=200
port=33898

default-storage-engine=INNODB
#lower_case_table_name=1
max_allowed_packet=16M

[mysql]
max_connections=200