mysql 5.7版本安装

1、下载tar包，这里使用wget从官网下载

wget https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

2、将mysql安装到/usr/local/mysql下
# 解压

tar -xvf mysql-5.7.22-linux-glibc2.12-x86_64.tar.gz

# 移动

mv mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/

# 重命名

mv /usr/local/mysql-5.7.22-linux-glibc2.12-x86_64 /usr/local/mysql

3、新建data目录

mkdir /usr/local/mysql/data

4、新建mysql用户、mysql用户组
# mysql用户组

groupadd mysql

# mysql用户

useradd mysql -g mysql

5、将/usr/local/mysql的所有者及所属组改为mysql

chown -R mysql.mysql /usr/local/mysql

6、配置

/usr/local/mysql/bin/mysql_install_db --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data

出现错误执行：
/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize
错误是如下：
/usr/local/mysql/bin/mysqld: error while loading shared libraries: libnuma.so.1: cannot open shared object file: No such file or directory
执行：
yum -y install numactl
# 完成后继续安装

/usr/local/mysql/bin/mysqld --user=mysql --basedir=/usr/local/mysql/ --datadir=/usr/local/mysql/data --initialize

[mysqld]
datadir=/usr/local/mysql/data
basedir=/usr/local/mysql
socket=/tmp/mysql.sock
user=mysql
port=3306
character-set-server=utf8
# 取消密码验证
skip-grant-tables
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
# skip-grant-tables
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid

7、开启服务
# 将mysql加入服务

cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysql

# 开机自启

chkconfig mysql on

# 开启

service mysql start

#查看初始密码
命令：cat /root/.mysql_secret

#登录

命令：bin/mysql -uroot -p

或者起别名:
alias mysql='/usr/local/mysql/bin/mysql'
vim ~/.bashrc
alias mysql='/usr/local/mysql/bin/mysql'
source ~/.bashrc
登录:mysql -u root -p

8、允许远程连接

mysql -u root -p
>>use mysql;
>>update user set host='%' where user = 'root';
>>flush privileges;
>>eixt;