make sftp-server

Sure, I can help you with that. To set up an SFTP server, you can follow these steps:

1. Install OpenSSH-server:
Run the following command to install OpenSSH-server on your system:

   sudo apt-get install openssh-server

2. Configure SSH:
Open the SSH configuration file using a text editor:

   sudo nano /etc/ssh/sshd_config

3. Uncomment or add the following line to allow SFTP access:

   Subsystem sftp internal-sftp

4. Configure the SFTP subsystem by adding the following lines at the end of the file:

   Match Group sftp-users
       ChrootDirectory /home/%u
       X11Forwarding no
       AllowTcpForwarding no
       ForceCommand internal-sftp

5. Create an SFTP group and user:
Run the following commands to create an SFTP group and user:

   sudo groupadd sftp-users
   sudo useradd -g sftp-users -s /bin/false -d /incoming sftpuser
   sudo passwd sftpuser

6. Restart SSH service:
Run the following command to restart the SSH service:

   sudo service ssh restart

After following these steps, you should have a functioning SFTP server. Clients can now connect to your server using an SFTP client with the provided username and password.