1、安装源

sudo curl -o /etc/yum.repos.d/mssql-server.repo https://packages.microsoft.com/config/rhel/7/mssql-server-preview.repo

2、安装MSSQL

## 进入超级用户模式
sudo su
## 安装数据库
yum install mssql-server

3、安装完成后配置setup

## 输入指令
/opt/mssql/bin/mssql-conf setup

## 选择数据库版本（自己用的话开发版就行，就是性能差点，2就是开发版）
usermod: no changes
Choose an edition of SQL Server:
  1) Evaluation (free, no production use rights, 180-day limit)
  2) Developer (free, no production use rights)
  3) Express (free)
  4) Web (PAID)
  5) Standard (PAID)
  6) Enterprise (PAID) - CPU Core utilization restricted to 20 physical/40 hyperthreaded
  7) Enterprise Core (PAID) - CPU Core utilization up to Operating System Maximum
  8) I bought a license through a retail sales channel and have a product key to enter.

Details about editions can be found at
https://go.microsoft.com/fwlink/?LinkId=852748&clcid=0x409

Use of PAID editions of this software requires separate licensing through a
Microsoft Volume Licensing program.
By choosing a PAID edition, you are verifying that you have the appropriate
number of licenses in place to install and run this software.
## 根据自己的情况选择版本
Enter your edition(1-8): 2
The license terms for this product can be found in
/usr/share/doc/mssql-server or downloaded from:
https://go.microsoft.com/fwlink/?LinkId=855862&clcid=0x409

The privacy statement can be viewed at:
https://go.microsoft.com/fwlink/?LinkId=853010&clcid=0x409
## 设置密码
Enter the SQL Server system administrator password: 
Confirm the SQL Server system administrator password: 
Configuring SQL Server...

sqlservr: This program requires a machine with at least 2000 megabytes of memory.
/opt/mssql/bin/sqlservr: This program requires a machine with at least 2000 megabytes of memory.

Initial setup of Microsoft SQL Server failed. Please consult the ERRORLOG
in /var/opt/mssql/log for more information.

4、验证服务是否正常开启

[root@ip-172-31-12-182 bin]# systemctl status mssql-server
● mssql-server.service - Microsoft SQL Server Database Engine
   Loaded: loaded (/usr/lib/systemd/system/mssql-server.service; disabled; vendor preset: disabled)
   Active: inactive (dead)
     Docs: https://docs.microsoft.com/en-us/sql/linux