Computer Science | Vassar College

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…

use_and_abuse

Anonymous (anonymous@undisclosed.example.com) — 2018-08-24T18:16:54+00:00

From time to time issues of computer privacy, fair use, or appropriate use of the Computer Science Department computer facilities come up. Any discussion must start with an understanding of the campus regulations on computer use. Campus Computer Regulations

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…

browser_wont_start

Anonymous (anonymous@undisclosed.example.com) — 2025-06-27T18:49:06+00:00

Help, my browser won't load! Generally, if you click the browser icon and it doesn't do anything, or gives you an error that mentions profiles, there's probably a previous instance of the browser that didn't clean up after itself. The first thing to check is if you have the browser open on another workstation. If you're logged into two workstations and try to start a browser on both of them, it will cause an error because the application wants to ensure that there is only one copy of it running…

isohome.script

Anonymous (anonymous@undisclosed.example.com) — 2008-05-07T02:42:44+00:00

isohome Isohome is a simple script that tries to make an image of your CS home directory that is suitable for burning onto a CD or DVD. It will confirm that you are running it from the machine where your home directory is actually a local disk. If not it will tell you which machine you need to run the script from.

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 …

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:

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

emacs_tips

Anonymous (anonymous@undisclosed.example.com) — 2015-08-27T14:16:13+00:00

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- means hold the CONTROL key while typing the character Thus, C-f would be: hold the CONTROL key and type f. M- means hold the META or EDIT or ALT key down while typing . …

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. ````````````````````````````````````````````````

todo

Anonymous (anonymous@undisclosed.example.com) — 2010-05-26T14:32:15+00:00

On The Table Upgrade the wiki - Greg Once done, I can put in the “task” plugin which will do this correctly... but for now if done, tag with (or highlight and use the Strikethrough icon (5th from the left) and add signature (the icon with the pencil on it 4th from the end) for date stamp.

krock

Anonymous (anonymous@undisclosed.example.com) — 2010-08-26T13:12:03+00:00

kroc install notes * Installed packages on martha listed on the debian install page * then grabbed “latest stable” with svn svn co http://projects.cs.kent.ac.uk/projects/kroc/svn/kroc/branches/kroc-1.5 kroc-svn which claims to be revison 6412

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.$$xfce4-taskmanager$$````````$$gnome-system-monitor$$````````

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.````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````````

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:

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 *

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. ````````````````````````````````````

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````````````````````````````````

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.

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

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 ````````````````````````````````````````````````````````````````

logging_out_of_a_desktop_or_remote_desktop

Anonymous (anonymous@undisclosed.example.com) — 2023-01-26T15:53:22+00:00

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…

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

mono

Anonymous (anonymous@undisclosed.example.com) — 2015-08-27T14:13:26+00:00

Mono 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.

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

forwarding_x11

Anonymous (anonymous@undisclosed.example.com) — 2023-02-14T20:09:25+00:00

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

using_htaccess

Anonymous (anonymous@undisclosed.example.com) — 2010-10-29T19:16:06+00:00

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…