SFTP use SSH protocal, allowing user to transfer files safely. It is a subsystem of SSH, so it runs in port 22.

The name contains FTP, however it is not implements FTP protocal

• It achieves the same function with FTP
• It is widely supported by FTP clients

When you want to transfer files with server, it might be a good choice.

How to setup a sftp user allowing it to upload files into specific folder

The following scripts helps setup a SFTP user in

Save it to .sh file, execute the following commands

chmod +x setup_sftp_user.sh
sudo ./setup_sftp_user.sh vendor

It will prompt you to set the password and configure the rest automatically.

#!/bin/bash

# Check if running as root
if [ "$EUID" -ne 0 ]; then
  echo "Please run as root or use sudo"
  exit 1
fi

# Check if username is provided
if [ -z "$1" ]; then
  echo "Usage: $0 <username>"
  exit 1
fi

USER=$1

# Create user
useradd -m $USER
passwd $USER

# Setup SFTP directories
mkdir -p /var/sftp/$USER/uploads
chown root:root /var/sftp/$USER
chmod 755 /var/sftp/$USER

chown $USER:$USER /var/sftp/$USER/uploads
chmod 755 /var/sftp/$USER/uploads

# Backup sshd_config
cp /etc/ssh/sshd_config /etc/ssh/sshd_config.bak

# Add SSH config for user
cat <<EOL >> /etc/ssh/sshd_config

Match User $USER
    ChrootDirectory /var/sftp/$USER
    ForceCommand internal-sftp
    AllowTcpForwarding no
    X11Forwarding no
EOL

# Restart SSH daemon
systemctl restart sshd

# Confirm success
echo "SFTP user '$USER' has been set up successfully."