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OpenSSH is a freely available version of the Secure Shell (SSH) protocol family of tools only method of access to a server is ssh, and you make a mistake in SSH is a powerful tool which allows secure remote login over insecure networks. This tutorial will cover the basics of SSH's most useful features. Ubuntu can use SFTP to treat your SSH server rather like a removable drive. you could create a folder alpha-centauri in your home folder, then do the following:

Following one of the ways to create a secure ssh server in Ubuntu 8.04 Server.

• Install Ubuntu 8.04 Server
• Change root password
  sudo passwd root

• Add new username
  sudo adduser to2k

• sudo visudo
  Append this line to end of ile
  to2k  ALL=(ALL) ALL

• SSH Configuration
  sudo nano /etc/ssh/sshd_config
  Find  Port 22 and change number to something different (12345) to make  hacking more difficult.
  Set these to:
  PermitRootLogin no
  X11Forwarding no
  UsePAM no
  Append these lines to the very end:
  UseDNS no
  AllowUsers to2k

• Reload SSH

/etc/init.d/ssh reload

• Test SSH Login

SSH login to your slice to new port, with your new username and password:
- Linux:   ssh -p 12345 to2k@192.168.100.100
- Windows: putty  to2k@192.168.100.100

If you logged on successfully via your new username: ‘to2k’ – you may close ‘root’ session now.

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