Installing and Configuring SSH with GUI Forwarding and File Transfer

1. Install and Configure OpenSSH Server

1. Install the SSH server:

   sudo apt-get install openssh-server
   

2. Edit the SSH server configuration file:

   sudo subl /etc/ssh/sshd_config
   

3. Restart the SSH service to apply changes:

   sudo service ssh restart
   

---

2. Enable GUI Forwarding

On the Server

Modify the SSH server configuration file /etc/ssh/sshd_config:

• Set the following options:

  X11Forwarding yes
  X11DisplayOffset 10
  X11UseLocalhost no
  ForwardAgent yes
  ForwardX11 yes
  ForwardX11Trusted yes
  

On the Client

1. Connect to the remote host with X11 forwarding:

   ssh -X remote_host(ip)
   

2. Test the GUI forwarding by running a graphical application like xclock:

   ssh -X user@host_ip
   xclock
   

   If the graphical clock appears, X11 forwarding is correctly configured.

---

3. File Transfer with SCP

Use the scp command to securely copy files or directories between local and remote systems:

• Copy a single file:

  scp <file> <username>@<IP address or hostname>:<Destination>
  

• Copy a directory recursively to the local system:

  scp -r username@server:(remote location) (local location)
  

• Copy a directory recursively to the remote system:

  scp -r (local location) username@server:(remote location)
  

---

With these steps, you can configure an SSH server, enable GUI forwarding, and securely transfer files between systems.