Connecting to Advanced Computing Systems

Use a secure-shell (SSH) client to connect for secure, encrypted communication. From within UM’s secure network (SecureCanes wired connection on campus) or VPN, connect from:


Connect using a terminal emulator like PuTTY (

Log into CCS ACS servers with the appropriate account credentials. Pegasus example: (optional username @ host)
22 (port)
SSH (connection type)
PuTTY in Windows

PuTTY in Windows

Mac and Linux

Connect with the Terminal program, included with the Operating Systems.

Log into CCS ACS servers with the approprite acount credentials. Pegasus example:

bash-4.1$ ssh’s password:

or SSH without account credentials to be prompted:

bash-4.1$ ssh
login as: username's password:

To use SSH key pairs to authenticate, see the CentOS wiki:

Forwarding the display with x11

To use graphical programs over SSH, the graphical display must be forwarded securely. This typically requires running an X Window System server and adding the -X option when connecting via SSH.

Download an X Window System server

_OS X versions 10.5 through 10.7 include X11 and do not require XQuartz._

Connect with X11 forwarding

Launch the appropriate X Window server before connecting to CCS servers via SSH.

Windows: Configure PuTTY for X11 display forwarding

In PuTTY Configuration,

  • scroll to the Connection category and expand it
  • scroll to the SSH sub-category and expand it
  • click on the X11 sub-category

On the X11 Options Panel,

  • check “Enable X11 forwarding”
  • enter “localhost:0” in the “X display location” text field


Mac: Connect with X11 flag

Using either the Mac Terminal or the xterm window, connect using the -X flag:

bash-4.1$ ssh -X

Launch a graphical application

Use & after the command to run the application in the background, allowing continued use of the terminal.

[username@pegasus ~]$ firefox &

Connecting to CCS Systems from offsite

Triton, Pegasus, and other CCS resources are only available from within the University’s secure campus networks (wired or SecureCanes wireless). To access CCS resources while offsite, open a VPN connection first. CCS does not administer VPN accounts.

University of Miami VPN: