Computing

The Department of Statistics shares a high-performance computer cluster (see http://hpc.cc.columbia.edu for details).

Please contact Dood Kalicharan (dk@stat.columbia.edu) for access if you are interested in using this machine for your research projects.

Department Computing FAQ

  • Our system administrator is Jai Anand Katsuri (jkasturi@columbia.edu). Please contact Jai if you are experiencing issues with your computer.
  • How can I access my email? You have access your Lionmail at http://lionmail.columbia.edu/ , and can see instructions of accessing Department mail at http://stat.columbia.edu/~liu/email.html
  • Can my files on the Unix server be accessed by others?By default, your mails including your inbox and saved mail folders cannot be accessed by others. All other files can not be altered by others, but can be seen by others if they correctly guessed your filenames including the entire path. You can change file/folder protection mode with the command “chmod”. You can learn how to use it by the command “man chmod”.If you don’t want others to read any of your files, put “umask077” in your startup file, and run “chmod -R go-rx *” once.To make your homepage still available to others, run “chmod og+rx public_html” afterwards.

    When you use the secure shell client downloaded from www.ssh.com (see below) to upload files from you PC to the Department server, you will also need to configure it to make sure your uploaded files won’t be readable by others. To do that, in the SSH Secure Shell client, click Edit -> Settings, look for “File Transfer” part in the left,then click “Advanced” beneath it, then on the right part, change “Default file permissions” to 600, and change “Default directory permissions” to 700. Then click OK. Then click File -> Save Settings.

    If this is too complicated for you to figure out on your own, please ask Wuyi to customize the folders for you by visiting his office during his hours in our department orsend him an email request.

    If you access from your pc:

    You need to download and install windows secure shell client.

    Download SSH client from http://stat.columbia.edu/~liu/ssh.exe.  After installation, you will find a secure shell client anda secure file transfer client on your desktop. They can be taken as the secured version replacement for telnet and ftp. To login or to do file transfer to department server, you connect to “stat.columbia.edu”.

    If you access from another unix machine:

    “ssh username@stat.columbia.edu” is the secure remote login command.

    “sftp username@stat.columbia.edu” is the secure file transfer command.

    If you access from Mac OS:

    The underlying operation system of Mac OS X is based on BSD Unix, which has built-in ssh support. The command line is identical to the unix commands mentioned above.

  • Printing see http://www.stat.columbia.edu/~liu/print.html for instruction on setting up printer on your pc.
  • Statistical SoftwarePlease refer to the Columbia University Information Technology (CUIT) website for all Statistical Software inquiries: http://cuit.columbia.edu/mathematical-statistical-software