# File Transfer Between Machines-Users **To transfer files between Machines and Users:** ✔️ All RUAI machines are based on Ubuntu OS. When transferring files between your local computer and a rented machine, **you need to use the terminal.** ✔️ This guide covers the usage of `scp` and `croc`. *** ## 1. Using SCP for File Transfer ### 1. Windows (Local Computer) ↔︎ Ubuntu (Remote Machine) **Windows (Local Computer) → Ubuntu (Remote Machine)** ✔️ For Windows 10, ensure that the OpenSSH Client is enabled. * Navigate to **\[Settings] → \[Apps & Features] → \[Optional Features]** to verify if OpenSSH is installed. ✔️ Then, open a terminal (CMD) or PowerShell and use the `scp` command to transfer files or directories to the remote destination. * The format for sending is as follows: ``` scp -P [machine development environment port] [path of file to send (can be dragged and dropped)] [username]@machine.runyour.ai:[remote machine storage path] ``` -To fill in the \[] placeholders, click the \[Open Development Environment] button on the rented machine to retrieve SSH connection information.

* When sending a file: ``` scp -P 30002 C:\image\image.zip ruai@machine.runyour.ai:/home/ruai ``` * When sending a folder: ``` scp -r -P 30002 C:\image\image.zip ruai@machine.runyour.ai:/home/ruai ``` **Ubuntu (remote machine) -> Windows (local computer)** ✔️To retrieve files or folders from a remote machine to your own computer, simply reverse the command. * Format for sending ``` scp -P [remote machine port] [username]@machine.runyour.ai:[remote file or folder path] [location to save on your computer] ``` * When retrieving a file: ``` scp -P 30002 ruai@machine.runyour.ai:/home/ruai/image.zip C:\image ``` * When retrieving a folder: ``` scp -r -P 30002 ruai@machine.runyour.ai:/home/ruai/image.zip C:\image ``` ### 2. mac OS(My Computer) ↔︎ **Ubuntu (remote machine)** Check the development environment before file transfer.

**macOS (local computer) → Ubuntu (remote machine)** * Format for sending: ``` scp -P [remote machine port] [path of the file to send (drag and drop to display the path)] [username]@machine.runyour.ai:[remote machine destination path] ``` * Example for sending a file: ``` scp -P 30002 /Document/image/image.zip ruai@machine.runyour.ai:/home/ruai ``` * Example for sending a folder: ``` scp -r -P 30002 /Document/image/image.zip ruai@machine.runyour.ai:/home/ruai ``` **Ubuntu (remote machine) → macOS (local computer)** * Format for sending: ``` scp -P [remote machine port] [username]@machine.runyour.ai:[remote file or folder path] [location to save on your computer] ``` * Example for retrieving a file: ``` scp -P 30002 ruai@machine.runyour.ai:/home/ruai/image.zip /Document/image ``` * Example for retrieving a folder: ``` scp -r -P 30002 ruai@machine.runyour.ai:/home/ruai/image.zip /Document/image ``` *** ## 2. Croc CLI Tool for File Transfer Croc is a CLI-based tool for easily transferring data between two computers. It utilizes relay for data transfer and applies end-to-end encryption. It supports cross-platform compatibility (Windows, Linux, macOS) and allows for multi-file transfers. ### 1. Installation **Unix** Open a terminal and run the following command to install: ``` nix-env -i croc ``` #### Ubuntu Open a terminal and run the following command to install: ``` wget https://github.com/schollz/croc/releases/download/v10.0.10/croc_v10.0.13_Linux-64bit.tar.gz tar -xvf croc_v10.0.13_Linux-64bit.tar.gz cp ./croc /usr/local/bin ``` **macOS (requires Homebrew)** Open a terminal and run the following command to install: ``` brew install croc ``` **Windows (requires scoop, choco, or winget)** For this guide, we'll use scoop for installation. First, run Windows PowerShell as an administrator and execute the following two commands sequentially to install scoop: ``` 1 // Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser 2 // Invoke-RestMethod -Uri https://get.scoop.sh | Invoke-Expression ``` Then proceed to install croc:

1 // # If using scoop
2 // scoop install croc
3 // 
4 // # If using choco
5 // choco install croc
6 // 
7 // # If using winget
8 // winget install schollz.croc

### 2. How to Use Open a terminal and connect to the remote machine. Both the sender and receiver should open their terminals and execute the following commands based on their roles. **Sending a File** ``` croc send [path to the file to be sent (you can set the path by dragging and dropping the file)] ``` Executing the above command will display a generated code in the terminal: ``` Code is : [code] ``` The recipient should enter this **code** to receive the file. **Receiving a File** ``` croc [code generated when sending the file] ``` Enter the code generated during the file transmission to receive the file. **Example** **Sender** **- Sending a file** (execute from your local computer or remote machine's terminal) ``` 1 // > croc send C:\image\image.zip 2 // Sending 'image.zip' (25182 B) 3 // # Code is generated. 4 // Code is: 0406-milk-parker-small 5 // On the other computer run ``` **Receiver** **- Retrieving a file** (execute from your local computer or remote machine's terminal) ``` 1 // > taster@machine-runyourai-1:~$ croc 0406-milk-parker-small 2 // Accept 'image.zip' (25182 B)? (Y/n) // Press Enter 3 // 4 // ... 5 // image.zip 100% |████████████████████| ```