Computer Science | Vassar College

access

Anonymous (anonymous@undisclosed.example.com) — 2025-09-30T20:21:28+00:00

Remote Access If you want to connect to CS machines from your dorm room or home, use a web browser or an SSH client. SSH encrypts all communications, so connections are secure. CS systems are normally accessible only from campus networks; for off‑campus access the supported method is Citrix. Citrix works best via the `ssh acl215`

top

Anonymous (anonymous@undisclosed.example.com) — 2025-03-05T18:37:15+00:00

Computer Science Lab <> Classroom : Resources Linux System Help * Linux Account Password * Printing * Remote Access * Browser Won't Start * Common Issues * Changing Desktop Background * Classroom Sound from Linux * Classroom Podium Monitor System Information * CS Lab Configurations * CS Department Firewall Overview ---------- Learning Linux... * Linux Tutorial * Command Line Basics * Advanced CLI * Emacs - tips * Bash programming and gene…

sshkeysmswindows

Anonymous (anonymous@undisclosed.example.com) — 2022-08-31T12:49:58+00:00

SSH Keys on Microsoft Windows using the PuTTY Utility SSH keys are what you will use to establish an encrypted connection over the network, e.g. the internet, between your system and a remote machine. The default type of key to generate is RSA which is good for most purposes. RSA is universally supported among SSH clients. Note that EdDSA performs much faster and provides the same level of security with significantly smaller keys. In general, though, for what you need to do, RSA encryption is …

info

Anonymous (anonymous@undisclosed.example.com) — 2016-05-18T15:53:52+00:00

Bash Shell Resources a few articles and tutorials on the web for learning the bash shell * * * * * System Info - User Help ---------- Help for New Users Unix information and help Examples for …

x2go

Anonymous (anonymous@undisclosed.example.com) — 2020-07-04T21:04:42+00:00

X2Go -- Remote Desktop Access About X2Go is a program that lets you use your account's desktop remotely. Imagine that you want to do work using DrRacket (or DrScheme, Netbeans, etc.) from your home computer but don't want to deal with the fuss of copying your work onto your CS account afterwards.

ssh

Anonymous (anonymous@undisclosed.example.com) — 2024-03-27T13:08:06+00:00

Accessing CS Systems The easiest way to gain access the Computer Science Dept. Linux machines outside of the Asprey computer lab. This gives you terminal access to the command line inside the department, and it allows you to send files back and forth to your home directory. Since it has no remote

ewc

Anonymous (anonymous@undisclosed.example.com) — 2011-05-10T16:58:56+00:00

Export a window to the Projector Please note, the instructor's workstation in room 105 has a resolution of 1280×1024, the student workstations have screen resolutions of 14450×900. Please resize any window you want to export to fit on the display where you are exporting it. ````````````````````````````````````````````````

jedit

Anonymous (anonymous@undisclosed.example.com) — 2015-08-26T21:23:27+00:00

Jedit tip -. End of line codes When using jedit to edit files that will be saved on a remote linux or unix system, you may run into problems if you don't change the code jedit puts at the end of the line to indicate a return. Jedit calles this the ````````````````````````````````````````````````````````````````

filecopy

Anonymous (anonymous@undisclosed.example.com) — 2020-07-04T20:59:05+00:00

Secure Shell on macOS, Unix, and Linux Installation Any modern Unix-like operating systems should come with secure shell client utilities already installed. This is true for macOS, Ubuntu, Fedora, Mandrake Linux, FreeBSD and many others. If, however, you need a ssh client, you can download one from the openssh website:

vnc

Anonymous (anonymous@undisclosed.example.com) — 2020-07-04T21:02:46+00:00

Using VNC What is VNC? NOTE: VNC is deprecated. For all remote desktop access, we ask that you use X2Go (found here). VNC is a system for interacting with a computer display remotely, over a network. This technology was developed by AT&T Laboratories, and is now available for free over the internet (distributed under the GNU General Public License. Visit the

priority

Anonymous (anonymous@undisclosed.example.com) — 2025-06-27T18:51:07+00:00

System Priorities Priorities of programs are something to be aware of. PS The first thing to do is to get to know your processes. The ps command lists out the processes you have running on the system. By using ps -l, an extended listing of your processes is provided. The fields of the most interest to this topic are the PID, NI, and COMMAND fields. The COMMAND field lists the name of the command that started your process. So, if you're looking for your runaway c++ program, a.out is the one yo…

printing

Anonymous (anonymous@undisclosed.example.com) — 2024-04-30T14:38:10+00:00

Setup To enable the printer, on the linux cmd line: * cd ~ * mkdir .cups * cd .cups * echo 'User 999nnnnnn' > client.conf (ensure that single quotes are used your 999 is entered) * chmod 400 client.conf (ensure that you can only read the file)

password

Anonymous (anonymous@undisclosed.example.com) — 2025-09-30T20:45:21+00:00

First Time Login The first time you log into a CS workstation with a temporary password, the login page will help you reset your password. First, enter your username (this will be the same as your Vassar email address, before the @-symbol): Enter your temporary password, which should have been given to you by your professor or sysadmin:

jump

Anonymous (anonymous@undisclosed.example.com) — 2023-03-06T19:51:56+00:00

SSH Proxy Jump (Might as Well Proxy Jump!) Announcement (March 06, 2023) As of March 06th, 2023, direct internet access to the CS Department bastion servers is no longer allowed. If you want to access these bastion servers then you need to be on the

linux

Anonymous (anonymous@undisclosed.example.com) — 2016-09-29T18:34:13+00:00

X2Go Ubuntu Installation * Step 1: Open a shell (Note: on most systems, you can to this by typing in Ctrl-Alt-t). * Step 2: Type in sudo apt-get install x2goclient. Hit Enter. * You will be prompted for your password. Type it, then hit enter. Note that as you type your password, the screen won't change (no *s will appear). This is normal; the computer is still registering your typing.

apple

Anonymous (anonymous@undisclosed.example.com) — 2021-03-04T00:22:24+00:00

X2Go macOS Installation may * Step 1: ” target=“blank”>Click here for the latest version to go to the download page for X2Go. ” target=“blank”>Click here for the previous versions.

kill_a_process

Anonymous (anonymous@undisclosed.example.com) — 2010-12-06T15:30:28+00:00

Monitoring and Killing Processes Any process you own you can kill (this is not a moral judgment, just a fact of life in Unix and Linux). Killing an offending process graphically If the machine itself is still responsive (but one or more windows perhaps aren't) you can try one of the Graphical Process Managers on our system.$$xfce4-taskmanager$$````````$$gnome-system-monitor$$````````

general_linux

Anonymous (anonymous@undisclosed.example.com) — 2023-01-02T19:31:21+00:00

More Help * Dr Scheme on OsX * JetBrains Software, IntelliJ (idea / pycharm), License * System Priorities * Frozen machine * Github or Any App Gives Issues with Keyring

sshkeys

Anonymous (anonymous@undisclosed.example.com) — 2023-01-19T02:50:27+00:00

Setting up SSH Keys Note : This tutorial assumes that you are running a linux-based operating system. The procedure for setting up keys on an Apple Mac OS X machine is similar to this procedure, but you may need to make some minor adjustments. There is a separate

drschemonmac

Anonymous (anonymous@undisclosed.example.com) — 2017-02-20T19:44:41+00:00

Getting Dr. Scheme to run on Mac * playonmac (www.playonmac.com) Install this program and then install the windows version of dr scheme. * x2go () Install x2go on your macbook and then connect to the virtual desktop. One advantage here is that you don't have to copy files that you create, that is, they will be in your $HOME directory the next time you log into one of the linux machines in SP309 or the Asprey lab in SP.

windows

Anonymous (anonymous@undisclosed.example.com) — 2021-02-11T14:53:34+00:00

X2Go Windows Installation * Step 1: ” target=“blank”>Click here for the latest version to go to the download page for x2go. ” target=“blank”>Click here for the previous versions.

crsound

Anonymous (anonymous@undisclosed.example.com) — 2023-02-21T21:04:28+00:00

Classroom Sound (Linux podium system) On your Linux podium desktop: * Open a terminal and type 'pavucontrol“; alternatively, Start button --> Sound & Video --> PulseAudio Volume Control * On the “Playback” tab, make SURE that “System Sounds

windows

Anonymous (anonymous@undisclosed.example.com) — 2019-05-24T11:55:54+00:00

Secure Shell on Windows Installation To log in to the CS Department computers, you will need a SSH client. There are several free SSH clients available for Windows. We have used PuTTY with great success. We have also used WinSCP to copy files between Windows and Unix computers.

linux_basics

Anonymous (anonymous@undisclosed.example.com) — 2016-05-18T16:17:28+00:00

Linux Basics Files, Directories and Paths * a file is a collection of data with a name (a filename to be precise). Although it may be stored in separate chunks in different location on the hardware, programs will generally work with a file as a single continuous collection of data.

crmonitor

Anonymous (anonymous@undisclosed.example.com) — 2022-09-06T15:39:31+00:00

SP105 * The default is monitor is Display 1 and overhead is display 2 SP307 * The system near the server room has an output connection to the CRESTRON. There is no projector but there is a flat panel TV mounted on the wall in this room. SP309

svn_use

Anonymous (anonymous@undisclosed.example.com) — 2015-08-26T21:24:38+00:00

SVN quick reference The following is modified from an email sent by Prof. Smith on the use of the command line svn program under linux here at CS To checkout (co) repository for first time * cd on your local machine to where you want your project working directory to be created````````````````````````````````

backups

Anonymous (anonymous@undisclosed.example.com) — 2015-08-26T20:52:53+00:00

FIXME update, convert to wiki, add link to isohome Backup With Tar ---------- * Overview * Creating a tar file of your entire directory * Copying the file to another location * Tar Documentation ---------- Overview While I make regular backups of the home directories on the Computer Science Unix machines, there are times when you want to have your own copy of your account. There are several relatively painless ways to accomplish this task. I will describe one of them here. If you n…

frozen

Anonymous (anonymous@undisclosed.example.com) — 2025-06-27T18:46:14+00:00

Frozen Machine! If you have a process, a window, or a machine that seems to have “frozen” while you were working on it, became “stuck,” is not responding to the keyboard or mouse, or is spewing out garbage into a window here is what you can try. If the steps below don't work, please get more help! Either ask a coach, an instructor or find or write me.

acm_jar_applets

Anonymous (anonymous@undisclosed.example.com) — 2010-11-24T23:10:16+00:00

Using acm.jar The ACM Java Task Force (JTF) created an API framework for Java programs which is distributed in the file acm.jar. Programs using acm.jar may be compiled and executed from the command line, or within your favorite Java IDE (e.g., Netbeans, DrJava). It is also possible to run your JTF programs as an applet within a browser or via the appletviewer. ````````````````````````````````````

account.size

Anonymous (anonymous@undisclosed.example.com) — 2022-09-02T18:02:19+00:00

Account Size Here are a few tips for managing the size of your Computer Science Unix account. How Much Space does My Account Use? du -s -h /home/YOUR_ACCOUNT_NAME This command will give you your total account size. The “-h” stands for “human readable

gate_tips

Anonymous (anonymous@undisclosed.example.com) — 2009-08-13T17:38:49+00:00

Gate tips Help! I still get GATE 5.0 Beta, not GATE 5.0 When you run gate you should see that you are running GATE Developer 5.0 build 3244. If you are not, then to use the new version you need to do the following 2 steps: * Delete your existing user configuration file, do that with the command: ````````````````````

isohome

Anonymous (anonymous@undisclosed.example.com) — 2009-10-14T17:24:59+00:00

Backup to CD/DVD ---------- * * * * * * ---------- The really short version of the instructions If you just want to do this without delay and can get to the CS lab... * Bring a blank CD or DVD to the lab *

java_system_tips

Anonymous (anonymous@undisclosed.example.com) — 2011-09-22T17:43:12+00:00

Java issues and tips Java remote method invocation problem Problem: When running a demo of Java's remote method invocation on our Ubuntu 9.04 based linux machines running java-6-openjdk the client could only attach to a server running on the same host.````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````

mitm

Anonymous (anonymous@undisclosed.example.com) — 2023-01-05T22:19:50+00:00

Host Key Verification Failed At some point you may attempt to SSH into a server, workstation or device, e.g. “my_server”, that you have logged into before and you encounter a long, scary message as follows that ends with “Host Key Verification Failed

linux_advanced

Anonymous (anonymous@undisclosed.example.com) — 2016-05-18T18:23:18+00:00

Linux Commands : file - search / replace For the following cmds, the test.file contains: 1 cat barn food 2 dog house kibble 3 fish water food 4 cow pasture grass grep “searches the named input FILE for lines containing a match to PATTERN”

languages_on_martha

Anonymous (anonymous@undisclosed.example.com) — 2010-09-06T14:21:20+00:00

Languages on Martha Well, perhaps this page should now be called Languages installed for Marc as we are moving to having each language installed globally - Greg key installed not installed name url notes tested 64bit install tested jspin got from spin, treated like mariedp1 script, files in /usr/local/share/jspin