linux下安装mysql-5.7.20

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1、下载地址

　　https://downloads.mysql.com/archives/community/ 

　　

2、安装步骤

解压：　

groupadd mysql
useradd -r -g mysql -s /bin/false mysql
cd /usr/local
tar zxvf /path/to/mysql-VERSION-OS.tar.gz
mv full-path-to-mysql-VERSION-OS mysql
chown -R mysql mysql/
chgrp -R mysql mysql/
cd mysql
mkdir mysql-files
chown mysql:mysql mysql-files
chmod 750 mysql-files

创建配置文件：

#先安装一下这个，要不然初始化有可能会报错
yum install libaio

 my.cnf配置：

#创建配置文件，内容如下，可以添加你需要的配置：
vim /etc/my.cnf
# 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
port=3309
datadir=/data/mysql
socket=/data/mysql/mysql.sock
skip-name-resolve
#skip-grant-tables
max_connections=1000
character_set_server = utf8
wait_timeout=31536000
interactive_timeout=31536000
collation-server=utf8_general_ci
lower_case_table_names=1

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

log-error=/data/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
[client]
socket=/data/mysql/mysql.sock
default-character-set = utf8

[mysql]
default-character-set = utf8

[mysql.server]
default-character-set = utf8

[mysqld_safe]
default-character-set = utf8
#保存内容,按esc输入如下命令
:wq

 初始化数据库：

mkdir /data/log
chown -R mysql:mysql /data
cd /var/run/
mkdir mysqld
chmod 777 mysqld
cd mysqld
vim mysqld.pid

chmod 777 mysqld.pid
chown mysql:mysql mysqld.pid

/usr/local/mysql/bin/mysqld --initialize --user=mysql

查看初始密码：

cat /data/log/mysqld.log
#执行后关注最后一点：root@localhost: 这里就是初始密码

启动服务，进入mysql，修改初始密码，运行远程连接（这里执行完后，密码将变成：123456）

/usr/local/mysql/support-files/mysql.server start

#vim /etc/mysql/my.cnf
#在[mysqld]项下添加
#skip-grant-tables
#service mysqld restart
cd /usr/local/mysql/bin
./mysql -uroot -p
执行后输入初始密码
alter user 'root'@'localhost' identified by '123456'; 
flush privileges;
use mysql;

#设置远程登录
GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '123456' WITH GRANT OPTION;
flush privileges;

开机自启：

cd /usr/local/mysql/
cp support-files/mysql.server /etc/init.d/mysqld
chkconfig --add mysqld
8、使用service mysqld命令启动/停止服务
service mysqld start/stop/restart

防火墙开开放3309端口：

vim /etc/sysconfig/iptables
service iptables restart
service mysqld restart

配置全局环境变量：

vi /etc/profile
PATH=/usr/local/mysql/bin:/usr/local/mysql/lib:$PATH
export PATH
设置环境变量立即生效
# source /etc/profile

查看安装路径：

find / -name mysql