[1] Nginx Server Setup - VirtualBox Installation and Putty Connection 


# How to Set Up a Linux Virtual Environment for Testing Using VirtualBox on Windows 10

Setting up a Linux virtual environment can be helpful for testing purposes. This guide walks you through setting up a virtual machine on Windows 10 using VirtualBox.

---

## 1. VirtualBox Download

To begin, download VirtualBox.


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- Go to [VirtualBox Downloads](https://www.virtualbox.org/wiki/Downloads).
- Download the installer for your OS (choose "Windows hosts" for Windows 10).

---

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After downloading, proceed with the installation by following the prompts.

---

## 2. RHEL (Red Hat Enterprise Linux) OS Download

Since CentOS reached its End of Life (EOL), it's recommended to use RHEL.

- Visit [RHEL Downloads](https://developers.redhat.com/products/rhel/download) (version 9.4 as of 2024.11.02).
- To use RHEL for free, register for an Individual Developer Subscription. There is no cost for registration.

---

## 3. VirtualBox - Setting Up a RHEL Virtual Machine

1. **Create a New Machine**
- Open VirtualBox and click "New.", Set the storage path.

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---

2. **Set Up VM Password**
- Create a password for your VM account during the installation setup.
   
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---


3. **Allocate Resources to VM**
- Allocate resources based on your computer's specs. For example, assign 4 CPU cores and 8GB of RAM, and set the disk size to 20GB.

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---


4. **Software Selection**
- Select the necessary software. If a GUI is not needed, deselect GUI-related packages to save resources.

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---


5. **Connection Check**
- Confirm that the virtual machine is correctly set up by starting it and verifying the console output.

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---

## 4. Connect to the VM Using Putty
- To connect to the VM, follow the steps below:

### 4-1. Verify VM Settings in VirtualBox

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```
1. Open VirtualBox, select the VM, and go to **Settings**.
2. Navigate to the **Network** tab, and set **Adapter 1** to **NAT**.
3. Set up port forwarding rules:

   - **Name**: Enter a name (e.g., SSH).
   - **Host Port**: Set an unused port on your host (e.g., 9999).
   - **Guest Port**: Enter 22 (default SSH port).

   Example:
   "putty -(9999 port)> VM -(22 port)> Linux"

```

### 4-2. Internal VM Configuration
- Download and start the SSH server

```
sudo yum install -y openssh-server  # Install SSH server
sudo systemctl start sshd           # Start SSH server
sudo systemctl enable sshd          # Enable SSH to start on boot
```

- Firewall configuration
```
sudo firewall-cmd --permanent --add-port=22/tcp
sudo firewall-cmd --reload

```

- Modify SSH configuration
```
sudo vi /etc/ssh/sshd_config

Edit the file as follows (In VI, find the term with '/term', press 'a' to edit, then press ESC and type ':w' to save)

#PermitRootLogin $value -> PermitRootLogin yes (necessary if the ID is root)
#PasswordAuthentication yes -> PasswordAuthentication yes
(Remove # and change to yes)

Restart SSH to apply changes:
sudo systemctl restart sshd

```
- Connection Verification

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키움 OPEN API MFC 개발 (1)

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* 키움 API 개발 - visual studio 2019 , MFC * Visual Studio Set - 새 프로젝트 만들기 / MFC 검색 - 다음 이후, MFC 설정에서 어플리케이션 종류 변경 (대화 상자 기반) * 기본 적용 Flow ( https://www.kiwoom.com/nkw.templateFrameSet.do?m=m1408000000 ) = 우선 생략하고, Step 2 설치 = Step 3 자료실/ KhOpenApiTest_2.71.zip 다운로드 * Step 2 설치 후, 설치 경로의 OpenAPI 디렉토리 찾기 1. 파일 찾기 2. KHOpenAPI.ocx 를 프로젝트 소스에 복사 * Step 3 자료실/다운로드 1. khOpenApiTest_2.71.zip 다운/압축 풀고,  2. KHOpenAPI.cpp/h KHOpenAPICtrl.cpp/h 프로젝트 소스에 복사 * 내부 소스에 다음추가 header에 class 생성 cpp에 다음 소스 추가 * 리소스 뷰 > IDD_TRADINGAPP_DIALOG 1. 확인 우클릭 > Active X 컨트롤 삽입 2. KHOpenAPI Control 적용 하면 위 화면처럼 적용 이후 실행 시 다음 화면 이후 매수/매도 적용
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