Introduction to SFTP
SFTP stands for "Secure File Transfer Protocol". Unlike traditional FTP, which transmits login credentials and data without encryption, SFTP provides file transfer capabilities over a secure SSH (Secure Shell) connection. This ensures that the data, including credentials, is encrypted and shielded from potential eavesdroppers.
Why Use SFTP Over Traditional FTP?
Security: Traditional FTP doesn't encrypt its data, making it susceptible to eavesdropping. SFTP, on the other hand, utilizes SSH's encryption capabilities, ensuring the data remains confidential during transit.
Integrity: SFTP includes mechanisms to ensure that data hasn't been altered during transmission, adding an extra layer of trustworthiness.
Authentication: SFTP can use SSH keys for authentication, providing a more secure and convenient method than simple password authentication.
Transferring Files with SFTP
To use SFTP, you'll need to establish an SSH connection. Once that's done, you can use SFTP commands within that secure shell to move files between the host and the client.
Connecting to a Remote Server with SFTP
To start an SFTP session, use the
sftp command followed by the username and
hostname (or IP address) of the remote server:
After running the command, you'll be prompted to enter the user's password. Once authenticated, you'll enter the SFTP environment.
Basic SFTP Commands
Here are some fundamental SFTP commands you can use:
pwd: Print the current directory on the remote system.
lpwd: Print the current directory on the local system.
ls: List files in the current directory on the remote system.
lls: List files in the current directory on the local system.
cd <directory>: Change the directory on the remote system.
lcd <directory>: Change the directory on the local system.
get <filename>: Download a file from the remote system to the local system.
put <filename>: Upload a file from the local system to the remote system.
Transferring Files with SFTP
- Uploading a File
To upload a file from your local machine to the remote server:
This will transfer
local-file.txt from your machine to the remote server's
- Downloading a File
To download a file from the remote server to your local machine:
This will fetch
remote-file.txt from the server and store it in your current
Ending the SFTP Session
When you're done transferring files, you can exit the SFTP session with:
SFTP is a secure and reliable method for transferring files between a client and a server. By leveraging the security features of SSH, SFTP ensures that your data remains protected during transit. Whether you're uploading or downloading files, using SFTP commands can help you achieve your objectives efficiently and securely.
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