Useful Tips

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Read the newsletter!

The CLASSE Computer Group publishes a weekly newsletter, usually at 2 PM on Mondays. A reminder is emailed to all Lab members when it is published. The newsletter normally contains notices of changes to the CLASSE computing environment which will affect you.

Where to go for help

1. CLASSE Computer Group (CCG)
   • The CLASSE Computer group is available to help with any and all IT related requests that further CLASSE's research and educational mission.
   • If it takes more than 5 minutes to resolve, it's worth getting in writing! Please submit service requests.
2. Cornell Information Technology (CIT)
   • CIT provides a variety of services to the Lab, including support for: Red Rover wireless networks, Exchange email, Cornell Box, Kronos, Workday, and others; see http://www.it.cornell.edu/services/ for a complete list
   • These services are supported by CIT, not by the CLASSE IT group. See https://www.it.cornell.edu/support/ for help with them.
   • The CLASSE Computer Group can provide only minimal ("best effort") assistance in dealing with CIT.
3. For other (personal, e.g.) computer support, various OutsideSupport providers may be able to help.

File Storage

There are several different places where you should keep your files.

1. files for your personal work-related use: your "user" folder
   • Windows: \\samba.classe.cornell.edu\user\userid (replace userid with your CLASSE userid)
   • UNIX: /nfs/user/userid
2. large files or files that other members of your work group will need should be stored in project or group file systems. Please see DataStewardship for more information.
3. temporary (easily regenerated) files
   • Windows: \\samba.classe.cornell.edu\tem, or C:\TEMP
   • UNIX: /cdat/tem, /tmp, or /var/tmp

Important Notes

• Files in 1. above are backed up. Please see BackupSchedule for a complete list of backed-up file systems.
• NEVER store important files on a local disk - on the computer that you sit in front of. Files on disks physically connected to your computer are NOT BACKED UP.
• Files stored in C:\TEMP, /tmp, /var/tmp, or /cdat/tem will be deleted if free space on those volumes goes below a preset threshold. Please see TemDisk for more information

For more information on where to store files, please see https://wiki.classe.cornell.edu/Computing/DataStewardship.

Simulation and development applications (multi-platform apps such as: Matlab, Mathematica, Python, etc)

It is likely that the app you want to use is already available in our standard Linux install. Please see LinuxSupport for an introduction to Linux Support at CLASSE.

To use a Linux application, log into a Linux computer using any of these methods:

• Using the Linux computer's local login window
• From a Mac: open Terminal, type ssh -Y userid@lnx201.classe.cornell.edu enter your CLASSE password when requested
  • Note: X11 or XQuartz is required
• Fom a CLASSE Windows PC: double-click on the desktop icon "RunXming"
  • Put lnx201.classe.cornell.edu in the "Host" box (and press the "Save" button if lnx201 is not in the list of saved hosts)
  • Supply your CLASSE userid and password when requested
  • Please see ConnectingToALinuxMachineFromWindows for more information.

Once you are logged in, at the command line prompt type whatever command is necessary to run the application. Usually it will be in the form /path_to_app/appname

Windows Apps from Linux or MacOS (Excel, Outlook, Project, etc)

Similarly, several Windows applications can be accessed from the desktop of Linux and Macintosh computers

• Invoke the appropriate ... script:
  • Most applications can be run in their own individual windows on a Linux desktop computer
  • A full Windows desktop environment by invoking winapp
• For details, see https://wiki.lepp.cornell.edu/Computing/WindowsRemoteDesktopServers

Printer Locations

The CLASSE Printer List has a table of CLASSE printers along with their locations and other parameters. Please print only what you need to and where you need to - we recycle many printouts sent to the "wrong" printer.

CLASSE Credentials

Your CLASSE userid and password provide access to CLASSE computing resources.

For details, p;lease see the Wiki page UserAccountsAndPasswords.

More Information

• https://wiki.classe.cornell.edu/Computing/NewUserOrientation
• https://wiki.classe.cornell.edu/Computing/UserInformation
• https://wiki.classe.cornell.edu/Computing/VideoTutorials