Hey its Amber im taking Cs50 online from home and I can get the hyperviser or cs50 appliance download. Ive looked on the the cs50 site and looked for it in google but found nothing. In the lectures for week 1 it don't give a url to go to. I really need to start on problem set 1 and cant til I have the Appliance. Please how do I get the Cs50 Appliance and where do I go to get it?
Not to worry if you have trouble taking either on your own! Programming is still for you. ? Taking CS50 itself in the fall comes with a whole lot of support, thanks to a team of teaching fellows (TFs) and course assistants (CAs), via weekly sections, office hours, and more. Email heads@cs50.harvard.edu in the meantime with any questions or concerns!
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I'm taking the course of HarvardX: CS50x Introduction to Computer Science. Normally for doing this course you have to use a virtual machine for running a Fedora system called the cs50 appliance, with all the things made easy, but I already use Kubuntu so I downloaded clang and the cs50 library and I want to change the default options of make to include the library and stop when there are errors in the c program that I try to compile. In the appliance the make command does: clang -ggdb3 -00 -std=c99 -Wall -Werror -argv-2.c -lcs50 -lm -o argv-2. It would be nice if you can explain what should be included and why. When I compile a .c file using make, it doesn't load the cs50 library and I get: undefined function ...
i'm a newbie and using the cs50 appliance(based on fedora) which is made for cs50 course on harvard university. we use the appliance as a virtual machine and they have set everything ready and any necessary tools installed so we just start "learning"
Then type source .cshrc or source .bashrc depending on which file you modified. Type: which sys161 to make sure that the system is able to find the tools. If the binary is located, you are all set!Course staff: If you would like to set up the tools on a newUbuntusystem, thisscript will help you. To install tools on Arch Linux,use thisscript. The Arch Linux script was contributed by Jade Lovelace. Italso contains a fix for a multiple-definition compiler error that mayappear on other systems.Option 2: Preparing to use the tools on your own machine in a VM.Using tools installed on the department server requires you to have a networkconnection. Sometimes you may wish to work from home on your own laptop in adisconnected mode. In that case, you can install a virtual appliance with allthe tools packaged inside. Follow these instructions if you would like to havethat option.To make tool installation easier on a variety of hardware and operatingsystems, we have created a virtual appliance with the tools alreadyinstalled. To run this appliance, you will first need to install software thatknows how to run virtual machines. In our case, this will be Virtual Box.Follow these instructions forinstalling Virtual Box on MacOS, Windows or Linux and then installing the CS50appliance. Note that we will be working with the 2014 version of the appliance. Make sure that you can launch your appliance.There are two ways youcan use your CS50 appliance. You can use your appliance in the window that popsup when you start it up. Alternately, you can access it remotely from your host(real) computer via a network connection. Look at the bottom-right corner of themachine window. You will see an IP address, such as 192.168.166.128. You can ssh(or sftp) to this IP address as ssh jharvard@192.168.166.128. This way, you cantreat the appliance as a server and edit files as you would on any remoteserver, either with an editor that can use sftp, such as TextWrangler orNotepad++, or using ssh and vim, emacs, nano, etc. If you are connecting to thevirtual machine or want to install new programs in it, you will need thepassword for jharvard. The password is crimson.For more information on how to use your appliance: connecting to it, copyingfiles, setting up Dropbox, taking a screenshot, etc.,click here.Now, depending on which appliance you chose to download, you have two options: If you downloaded an appliance without tools, you must install the toolsthat we will be using in this class yourself. If you wish to do so, please follow instructions here. An easier way is to download an appliance with toolsalready installed. Then you can simply launch this appliance in your virtual box and you do not need to install your own tools. Option 3: Preparing to use the tools on MacOSThese instructions will teach you how toinstall all the needed tools on a MacOS, so you can work from your Mac systemwithout needing a network connection.Option 4: Set up the tools on your own Ubuntu Linux machineAll you need to do is to download the following script: wget -ubuntu-darwin.shDepending on the software installed on your system, you may or may not havepre-requisite packages, such as bmake, libncurses, libmpc, etc. If unsure, openthe script you just downloaded and uncomment the line at the top of the script,which installs these packages, so that this:#echo '*** Installing Ubuntu packages ***' #sudo apt-get -y install bmake ncurses-dev libmpc-devturns into this:echo '*** Installing Ubuntu packages ***' sudo apt-get -y install bmake ncurses-dev libmpc-dev Now run the script:$ bash ./cs161-ubuntu-darwin.shStep 2: Get the OS161 source code and set up the source managementCourse staff: click here forinstructions to import the source tree into an empty repo. Here arethe old instructions for creating the master repo on the ssh.ece server. In order to manage your source code, collaborate on the code with yourpartner and submit your assignments, you will be using a software versionmanagement system called Git. Read this shortintroductory guide to git before proceeding.As explained in the guide, though git is a distributed environment, it iscustomary to have one clone of the repository reside on a more secure backed upserver where your files are less likely to get lost or become compromised. Inthis document we will refer to this repository as the "master" repository. Sothe very first thing that you will do is create such a master repository foryourself. Then you will clone this repository either on your CS50 appliance orin another directory on the ssh.ece server, so you can develop,build and debug the code there.You will create the master repository on GitHub.com and import the OS161 basecode into it. Follow the instructions here.Step 3: Configure and build the source treeThese instructions are adaptedfrom here.To build your OS161 for the first time, refer to a "quick" set of instructionsbelow. For future building of OS161 we expect you to be familiar with a long setof instructionsfound here. Theyexplain more about each step of the build process and when you need to rerun it.The instructions below assume that you have followed the steps above and thatyou have an environment with the tools installed, either in your virtualappliance or on the ssh.ece server, and that you have a clone of your master gitrepository either on the virtual appliance or somewhere in your home directoryat ssh.ece server. We assume that your git clone lives in the ~/os161/srcdirectory. In the shell type the following commands: Configure the build.cd ~/os161/src./configure --ostree=$HOME/os161/root Build userland.bmakebmake install Configure a kernel.cd kern/conf./config DUMBVM Compile and install the kernelcd ~/os161/src/kern/compile/DUMBVMbmake dependbmakebmake installStep 4: Run your kernel on System/161And now, to the most exciting part: run your kernel on the System 161simulator. The manual for System/161 can befound here.First off, you need a configuration file. We will simply use an existingsample file and copy it into the root tree of your kernel: wget people.ece.ubc.ca/os161/download/sys161.conf.sample -O ~/os161/root/sys161.confThen, run it!cd ~/os161/rootsys161 kernel Home | Install OS161 | Understand and debug OS161 | Contact Us
This machine is used in the production line of high-frequency pipe or seamless steel pipe. It is a special equipment for milling and chamfering the end face of steel pipe.
The machine consists of a power head, a power head feeding mechanism, a clamping mechanism, a pushing mechanism, a traverse mechanism, an electronic control system, and a pneumatic system. The clamping mechanism is driven by the cylinder; the power head is driven by the motor through the belt drive spindle, and then the cutter head is rotated; the power head is fed by the servo motor and the reducer through the ball screw; the traverse mechanism is composed of the motor, the brake, the reducer, and the step Into the organization. In the automatic working state, the movement of each component is controlled by the electric appliance and the PLC, so that the entire steel pipe flat chamfering process is automatically and continuously operated. 0852c4b9a8
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