第一步：下载mysql
mysql社区版官网下载：MySQL :: Download MySQL Community Server (Archived Versions)
mysql安装检查
1、使用whereis命令(安装包方式)，如果安装了mysql，会显示文件安装的地址
whereis mysql
2、检查是否本地已经安装了mysql(直接安装方式)
rpm -qa | grep mysql
3、卸载以前的mysql
rpm -e 已经存在的MySQL全名
第二步：解压文件
1、将压缩包解压到指定目录下。-C 选项的作用是：指定需要解压到的目录。
[root@localhost ~]# tar -zxvf mysql-5.7.17-linux-glibc2.5-x86_64.tar.gz -C /usr/local/2、将文件名修改为mysql
[root@localhost local]# mv mysql-5.7.17-linux-glibc2.5-x86_64/ mysql第三步：配置启动文件
（1）进入mysql的support-files目录，复制 my.cnf 到 /etc/my.cnf(mysqld启动时自动读取)
[root@localhost local]# cd mysql/support-files/
[root@localhost support-files]# cp my-default.cnf /etc/my.cnf
cp: overwrite ‘/etc/my.cnf’? yes 如果安装新版没有my-default-cnf默认文件，可以新建配置内容如下：
# Example MySQL config file for medium systems.
#
# This is for a system with little memory (32M - 64M) where MySQL plays
# an important part, or systems up to 128M where MySQL is used together with
# other programs (such as a web server)
#
# MySQL programs look for option files in a set of
# locations which depend on the deployment platform.
# You can copy this option file to one of those
# locations. For information about these locations, see:
# http://dev.mysql.com/doc/mysql/en/option-files.html
#
# In this file, you can use all long options that a program supports.
# If you want to know which options a program supports, run the program
# with the "--help" option.
# The following options will be passed to all MySQL clients
[client]
default-character-set=utf8
#password = your_password
socket = /tmp/mysql.sock
# Here follows entries for some specific programs
# The MySQL server
[mysqld]
default-storage-engine=INNODB
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data
character-set-server=utf8
init_connect='SET NAMES utf8
port = 8888
socket = /tmp/mysql.sock
skip-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
character-set-server=utf8
init_connect='SET NAMES utf8'
# Don't listen on a TCP/IP port at all. This can be a security enhancement,
# if all processes that need to connect to mysqld run on the same host.
# All interaction with mysqld must be made via Unix sockets or named pipes.
# Note that using this option without enabling named pipes on Windows
# (via the "enable-named-pipe" option) will render mysqld useless!
#
#skip-networking
# Replication Master Server (default)
# binary logging is required for replication
log-bin=mysql-bin
# binary logging format - mixed recommended
binlog_format=mixed
# required unique id between 1 and 2^32 - 1
# defaults to 1 if master-host is not set
# but will not function as a master if omitted
server-id = 1
# Replication Slave (comment out master section to use this)
#
# To configure this host as a replication slave, you can choose between
# two methods :
#
# 1) Use the CHANGE MASTER TO command (fully described in our manual) -
# the syntax is:
#
# CHANGE MASTER TO MASTER_HOST=<host>, MASTER_PORT=<port>,
# MASTER_USER=<user>, MASTER_PASSWORD=<password> ;
#
# where you replace <host>, <user>, <password> by quoted strings and
# <port> by the master's port number (3306 by default).
#
# Example:
#
# CHANGE MASTER TO MASTER_HOST='125.564.12.1', MASTER_PORT=3306,
# MASTER_USER='joe', MASTER_PASSWORD='secret';
#
# OR
#
# 2) Set the variables below. However, in case you choose this method, then
# start replication for the first time (even unsuccessfully, for example
# if you mistyped the password in master-password and the slave fails to
# connect), the slave will create a master.info file, and any later
# change in this file to the variables' values below will be ignored and
# overridden by the content of the master.info file, unless you shutdown
# the slave server, delete master.info and restart the slaver server.
# For that reason, you may want to leave the lines below untouched
# (commented) and instead use CHANGE MASTER TO (see above)
#
# required unique id between 2 and 2^32 - 1
# (and different from the master)
# defaults to 2 if master-host is set
# but will not function as a slave if omitted
#server-id = 2
#
# The replication master for this slave - required
#master-host = <hostname>
#
# The username the slave will use for authentication when connecting
# to the master - required
#master-user = <username>
#
# The password the slave will authenticate with when connecting to
# the master - required
#master-password = <password>
#
# The port the master is listening on.
# optional - defaults to 3306
#master-port = <port>
#
# binary logging - not required for slaves, but recommended
#log-bin=mysql-bin
# Uncomment the following if you are using InnoDB tables
#innodb_data_home_dir = /usr/local/mysql/data
#innodb_data_file_path = ibdata1:10M:autoextend
#innodb_log_group_home_dir = /usr/local/mysql/data
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
#innodb_buffer_pool_size = 16M
#innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
#innodb_log_file_size = 5M
#innodb_log_buffer_size = 8M
#innodb_flush_log_at_trx_commit = 1
#innodb_lock_wait_timeout = 50
[mysqldump]
quick
max_allowed_packet = 16M
[mysql]
no-auto-rehash
# Remove the next comment character if you are not familiar with SQL
#safe-updates
default-character-set=utf8
[myisamchk]
key_buffer_size = 20M
sort_buffer_size = 20M
read_buffer = 2M
write_buffer = 2M
[mysqlhotcopy]
interactive-timeout配置数据库编码：
[root@localhost support-files]# vim /etc/my.cnf添加以下内容：
[mysql]
default-character-set=utf8
[mysqld]
default-storage-engine=INNODB
character_set_server=utf8
basedir=/usr/local/mysql
datadir=/usr/local/mysql/data（2）复制mysql.server到/etc/init.d/目录下(目的想实现开机自动执行效果)
[root@localhost support-files]# cp mysql.server /etc/init.d/mysql（3）出于安全便利，创建一个操作数据库的专门用户
1、建立一个mysql的组:
[root@localhost support-files]# groupadd mysql2、建立mysql用户，并且把用户放到mysql组，－g：指定用户所属的起始群组。
[root@localhost support-files]# useradd -r -g mysql mysql(用户名)3、给mysql用户设置一个密码:
[root@localhost support-files]# passwd mysql4、给目录/usr/local/mysql 更改拥有者，chown -R 用户名:组名
[root@localhost support-files]# chown -R mysql:mysql /usr/local/mysql/
第四步：使用专门用户初始化 mysql 的数据库
[root@localhost support-files]# cd /usr/local/mysql/bin/[root@localhost bin]# ./mysqld --initialize --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data
A temporary password is generated for root@localhost: ,aR9Y-r<e<c6初始化后会生成一个临时密码 root@localhost:：*(最好先记录这个临时密码)
1、给数据库加密
[root@localhost bin]# ./mysql_ssl_rsa_setup --datadir=/usr/local/mysql/data2、启动mysql
[root@localhost bin]# ./mysqld_safe --user=mysql& 或者
[root@localhost ~]# /etc/init.d/mysql start 关闭mysql可执行
[root@localhost ~]# /etc/init.d/mysql stop3、检查mysql是否启动：发现有进程便代表启动成功。
[root@localhost bin]# ps -ef|grep mysql
第五步：进入客户端
1、登陆
[root@MiWiFi-R3-srv bin]# ./mysql -uroot -p
Enter password:这里输入之前的临时密码2、修改密码:set password for username@localhost = password('新密码');
mysql> set password for root@localhost = password('root');第六步：设置远程访问
（1）设置mysql的远程访问
设置远程访问账号:grant all privileges on . to 远程访问用户名@’%’ identified by ‘用户密码’;
mysql> grant all privileges on *.* to root@'%' identified by 'root';刷新
mysql> flush privileges;（2）防火墙设置：打开mysql的默认端口3306
[root@localhost bin]# firewall-cmd --zone=public --add-port=3306/tcp --permanent
success[root@localhost bin]# firewall-cmd --reload
success
第七步：设置开机自启动
1、添加mysql服务：Linux chkconfig 命令用于检查，设置系统的各种服务
[root@localhost bin]# chkconfig --add mysql2、设置mysql服务为自启动
[root@localhost bin]# chkconfig mysql on3、配置环境变量
[root@localhost ~]# vim /etc/profile4、在最后一行添加
export PATH=$JAVA_HOME/bin:/usr/local/mysql/bin:$PATH5、重新加载配置文件
[root@localhost ~]# source /etc/profile至此，mysql5.7的安装就完成