AST4723LinuxTutorial

AST4723LinuxTutorial - AST 4723 Linux Exercises: Week 1...

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AST 4723 Linux Exercises: Week 1 Objective: Essentially all astronomy software programs are designed and run on the Linux operating system. A rudimentary knowledge of Linux commands is essential for astronomy, while a more in depth understanding can save a great deal of time when processing data. This lab is designed as a first introduction to basic commands in the Linux operating system that will be useful during the course of the semester. The lab during the second week of the semester will also focus upon Linux and will build upon this tutorial. Lab Instructions: 1. Congratulations – you should all have obtained working departmental accounts yesterday. The first task for the evening will be to verify your account is working properly. Open a web browser and go to: http://webmail.astro.ufl.edu This page is the access point for the department email system. Enter your user name and password in the appropriate blanks and this will take you to the email interface. If you get to this interface then your account is operational. During the semester all class-related emails will be sent to your departmental email account ( username@astro.ufl.edu ), so be sure to check it. Right now you should try sending a test email to someone else in the class. Also remember that use of this email account is subject to the conditions listed on the form that you signed when obtaining the account. 2. Once you are done testing email, double click on the Cygwin icon (looks like black C with a green right arrow in the middle) on the Windows desktop. This will open up a shell window. Note that Cygwin is free, downloadable software, which you can install on your Windows machine at home if you wish to work on tutorials or projects remotely. If you have a Mac at home, Mac OS-X is based upon Linux and so you can run and install all the astronomy software directly on your computer if desired. If you wish to do this, let us know and we will assist. 3. At the prompt, type startx in the shell. At this point an x-terminal (xterm) window will open up. 4. Inside of the xterm type: ssh –Y username@siesta.astro.ufl.edu and enter your password when prompted. The command ssh stands for secure shell and is a secure method of connecting to other computers. With this step you are logging into the remote computer siesta. While your username and password will enable you to connect to any linux machine in the astronomy department, it is proper etiquette to only connect to the public machines and those to which you have expressly been given permission. For this class you may connect to the computers siesta and clementine , which are faster than the public machines.
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5. When you are done with the above steps you will be ready to work remotely on the computer siesta. As a first test, try typing . If everything is working correctly, this command should open up a new window with a pair of eyes that follow the mouse around the screen. The “&” at the end of the command tells the computer that you want this program run in the background so that you can still
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AST4723LinuxTutorial - AST 4723 Linux Exercises: Week 1...

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