https://www.cs.vassar.edu/ 2026-04-18T15:41:11+00:00 https://www.cs.vassar.edu/ https://www.cs.vassar.edu/_media/favicon.ico text/html 2025-09-30T20:21:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/access?rev=1759263688&do=diff 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` text/html 2016-05-18T15:53:52+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/info?rev=1463586832&do=diff Bash Shell Resources a few articles and tutorials on the web for learning the bash shell * <http://www.arachnoid.com/linux/shell_programming.html> * <http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO.html> * <http://www.panix.com/~elflord/unix/bash-tute.html> * <http://www.codecoffee.com/tipsforlinux/articles2/043.html> * <http://www.cyberciti.biz/nixcraft/linux/docs/uniqlinuxfeatures/lsst/> System Info - User Help ---------- Help for New Users Unix information and help Examples for … text/html 2020-07-04T21:04:42+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/x2go?rev=1593896682&do=diff 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. text/html 2015-08-27T14:13:26+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/apps/mono?rev=1440684806&do=diff Mono <quote Wikipedia>Mono is a free and open source project led by Xamarin (formerly by Novell and originally by Ximian) to create an Ecma standard compliant .NET Framework-compatible set of tools including, among others, a C# compiler and a Common Language Runtime.</quote> text/html 2016-08-29T11:42:30+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/desktop_background?rev=1472470950&do=diff Change Desktop Background * Right click on Desktop * Select “Desktop Preferences” * Select the “Wallpaper” option * Navigate to usr --> share --> backgrounds at the top of the window * Choose background, click the “Open” button text/html 2023-01-26T15:53:22+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/logging_out_of_a_desktop_or_remote_desktop?rev=1674748402&do=diff Logging out of the Computer Science Computers Leaving files open in editors such as pluma and emacs, or leaving applications running can lead to corrupt files and loss of your work because your files are not local to any computer. Your files are shared from a central server. Therefore, if you leave an application open on one computer and then go to another computer, you have several devices trying to access your files. Applications don’t like this. Firefox, for example, won’t allow you to star… text/html 2011-09-22T17:43:12+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/java_system_tips?rev=1316713392&do=diff 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.```````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````` text/html 2022-08-31T12:49:58+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/sshkeysmswindows?rev=1661950198&do=diff 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 … text/html 2022-09-06T15:39:31+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/crmonitor?rev=1662478771&do=diff 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 text/html 2010-09-06T14:21:20+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/inhouse/languages_on_martha?rev=1283782880&do=diff 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 text/html 2019-05-24T11:55:54+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/windows?rev=1558698954&do=diff 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. text/html 2011-05-05T19:17:27+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/inhouse/using_the_pickup_script?rev=1304623047&do=diff Using the pickup script with your course What it is The pickup script is a companion to the submit script. Pickup allows you to place files for pickup in your course directories such that those files cannot be read by your students until they run this script. At that time an entry is logged showing the date, time, user and directory that was picked up. If your students attempt to kill the script (say, after it copies the files and before it logs that it has) that attempt will also be logged… text/html 2010-12-06T15:30:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/kill_a_process?rev=1291649428&do=diff 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.$$xfce4-taskmanager$$````````$$gnome-system-monitor$$```````` text/html 2011-05-10T16:58:56+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/ewc?rev=1305046736&do=diff 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. ```````````````````````````````````````````````` text/html 2025-06-27T18:51:07+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/priority?rev=1751050267&do=diff 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… text/html 2024-04-30T14:38:10+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/printing?rev=1714487890&do=diff 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) text/html 2025-03-05T18:37:15+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/top?rev=1741199835&do=diff 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… text/html 2023-02-14T20:09:25+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/forwarding_x11?rev=1676405365&do=diff Forward X11 Very few systems here are configured to forward X11 via SSH. And this will generally be reserved for request by the faculty and not for classroom computers. If you require a GUI environment then you are strongly encouraged to use the Guacamole server by logging in at text/html 2020-07-04T20:59:05+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/filecopy?rev=1593896345&do=diff 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: text/html 2020-07-04T21:02:46+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/vnc?rev=1593896566&do=diff 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 text/html 2015-08-27T14:16:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/emacs_tips?rev=1440684973&do=diff Emacs Tips Emacs Command Shorthand From the emacs built in tutorial Emacs commands generally involve the CONTROL key (sometimes labeled CTRL or CTL) or the META key (sometimes labeled EDIT or ALT). Rather than write that in full each time, we'll use the following abbreviations: C-<chr> means hold the CONTROL key while typing the character <chr> Thus, C-f would be: hold the CONTROL key and type f. M-<chr> means hold the META or EDIT or ALT key down while typing <chr>. … text/html 2017-02-20T19:44:41+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/drschemonmac?rev=1487619881&do=diff Getting Dr. Scheme to run on Mac * playonmac (www.playonmac.com) Install this program and then install the windows version of dr scheme. * x2go (<https://www.cs.vassar.edu/help/general_linux/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. text/html 2015-08-26T20:52:53+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/general_linux/backups?rev=1440622373&do=diff 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… text/html 2022-11-10T16:19:51+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/keyring_issues?rev=1668097191&do=diff Keyring Issues If you are using an application, e.g. GitHub, and you get an error because of your “keyring” then a quick workaround is to find that keyring and push it out of the way. Open a terminal and use the find command as such: $ cd $ find . -type f -name "*ring" ./.local/share/keyrings/login.keyring text/html 2025-06-27T18:46:14+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/frozen?rev=1751049974&do=diff 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. text/html 2011-02-24T17:38:24+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/inhouse/rsync_windows?rev=1298569104&do=diff Synchronization with your CS account from Windows /!NOTE this is the beginning of a page on this topic, this information is incomplete at this time -Greg !/ tools cwRsync - get it <http://www.itefix.no/i2/node/10650> get latest cwRsync_VERSION.zip (not cwRsyncServer_VERSION.zip) from ```` text/html 2010-05-17T16:53:13+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/inhouse/summer_2010?rev=1274115193&do=diff Summer 2010 Labs * OS upgrade Faculty Desktops * OS upgrade Servers * OS upgrade? * Add redundant dhcp server * Upgrade Mail server text/html 2010-10-29T19:16:06+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/sysnews/inhouse/using_htaccess?rev=1288379766&do=diff Using htaccess for web pages Please note: htaccess is for pages served from OUTSIDE THE WIKI in users directories. The wiki has similar ability, but it is set up differently -Greg Web Access Restriction by user/password This can be used in many ways, the user and password are not related to our system users and passwords, so you can use anything you like, however, there is no mechanism for the web users to maintain or reset their htaccess password so it can become a maintenance nightmare qui… text/html 2023-02-21T21:04:28+00:00 Anonymous (anonymous@undisclosed.example.com) https://www.cs.vassar.edu/help/crsound?rev=1677013468&do=diff 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