se101 foundations of software engineering iwalt/se101/slides/how_to... · · 2013-10-09windows...

SE101Foundations of

Software Engineering I

How to submit assignments

Tuesday, October 8, 13

• review underlying technologies

• ssh, NFS, X11, Eclipse, git

• how they all fit together

• how to use them

• here, at home

• disclaimer: I'm intentionally skipping some of the details


ssh — Secure Shell


ssh

• "secure shell"

• replaced telnet and rsh

• used to login to remote unix boxes


$ ssh [user@]host

"[user]" means it's optional; you can leave off "user" if it's the same on both boxes

$ ssh tux.cs.drexel.edu

$ ssh [email protected]


mailto:[email protected]

mailto:[email protected]

Linux• open a terminal windowOS X• open a terminal window (pref. under

XQuartz)Windows• putty

Running ssh


NFS — Network File System


NFS

• A way to "mount" files over a network

• like windows drive letters, but more integrated

• Why do you care?

• same homedir on any CS workstation


Unix Filesystem HierArchy


Unix Filesystem HierArchy

On the network


X Windows


X Windows

• Also called "X" and "X11"

• Common on Unix systems (except OS X)

• Needs to be installed separately on Windows and OS X


X Windows

• client-server (but "reversed)

• windows from remote apps appear on local workstation

• can run Eclipse remotely


X11 + ssh

To run Eclipse (or any other X11 app) remotely from tux, you need 2 things:1. an X server2. run ssh with "X forwarding" (also

known as "running X over an ssh tunnel")


Remote X11 from Linux

1. you're already running X2. ssh -X tux.cs.drexel.edu3. eclipse&


Remote X11 from OS X1. Install XQuartz

http://xquartz.macosforge.org2. Run XQuartz3. Open a terminal (might happen

automatically)4. ssh -X tux.cs.drexel.edu5. eclipse&


http://xquartz.macosforge.org

http://xquartz.macosforge.org

Remote X11 from Windows


Drexel University Software Engineering Research Grouphttp://serg.cs.drexel.edu 10

Accessing tux off campus

• For Windows, download:• Putty: http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

• Putty is an SSH client used to connect to tux

• Xming: http://www.straightrunning.com/XmingNotes/

• Xming is an X server used for Eclipse


http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html

http://www.straightrunning.com/XmingNotes/

http://www.straightrunning.com/XmingNotes/

Drexel University Software Engineering Research Grouphttp://serg.cs.drexel.edu

Accessing tux off campus

• Start putty and type tux.cs.drexel.edu for the host name

• Under Connection – SSH – X11 check “Enable X11 Forwarding”

• Click Open

11


Git



What is Git?

Git is a distributed version control system enabling you to:•Easily track the changes you make to your code

•Easily collaborate with others when you write code

Useful links:•Git: http://git-scm.com/

•Wikibooks: http://en.wikibooks.org/wiki/Git/Introduction

3


http://git-scm.com/

http://git-scm.com/

http://en.wikibooks.org/wiki/Git/Introduction

http://en.wikibooks.org/wiki/Git/Introduction


Git repository hierarchy

15

***Remember to use push and pull commandsto keep working copies synchronized***



Git workflow• Every time you create a new file or change and existing file you

have to use four commands:

• git pull: make sure your working copy is up to date before doing work to avoid conflicts

• git add: to add the files you created / changed

• git commit –m "message": to commit the changes to your cloned repository

• git push: to push the changes to the master

• Always remember to check the status to make sure your changes are committed

10



Working off campus (Ubuntu)

12

Install Git if you don’t have it yet:

$ sudo apt-get install git

Change to the directory you want to clone to

$ cd whatever_path_you_want

Remember, this is your computer, so you can put this wherever you want. Somewhere in your home folder would make sense, like ~/se101/

Clone the master:

$ clone [email protected]:~/se101/git/se101.git workspace

** Always remember to “git pull” to avoid conflicts **



Working off campus (OSX)

14

• Install Git if you don’t have it yet: http://git-scm.com/download

• Start a new terminal window (Apple-Space and then type Terminal)

• You will be in your /users/userid folder on your computer. It would make sense to change to your documents folder

$ cd Documents

• Now, you can follow the Unix instructions (skipping the installation step)


http://git-scm.com/download





Working off campus (Windows)

13

• Install Git if you don’t have it yet: http://git-scm.com/download

• Make sure you choose: checkout as-is and commit unix-style during install.

• Now run Git Bash from your start menu and you have a bash shell you can work in.

• By default, you will be in your /c/User/Username folder. Changing to your My Documents folder would be prudent:

$ cd Documents

• Now, you can follow the Unix instructions (skipping the installation step)






Working off-campus (Windows)

Git Extensions (http://code.google.com/p/gitextensions/)


http://code.google.com/p/gitextensions/




Submitting Homework 1

When you are finished, check your work into git:

$ cd ~/se101/git/workspace(or wherever you did your work)

$ git add A1*$ git commit -m "finished assignment 1"$ git push
