A short introduction to the sub department s computer systems gareth thomas
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A short introduction to the sub-department's computer systems Gareth Thomas. Linux, it's not Windows. Overview. The operating system and Gnome desktop Using the command line Web and email The text editor is your friend The network Office applications Remote access

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Linux, it's not Windows

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A short introduction to the sub department s computer systems gareth thomas

A short introduction to the sub-department's computer systems

Gareth Thomas

Linux, it's not Windows


Overview

Overview

  • The operating system and Gnome desktop

  • Using the command line

  • Web and email

  • The text editor is your friend

  • The network

  • Office applications

  • Remote access

  • If you really want Windows


The operating system

The operating system

  • Operating system is Ubuntu 10.04

    • i.e. Linux

  • The user interface you'll be using is called Gnome and is fundamentally not too dissimilar to Windows...


The command line

The command line

  • Linux has a very powerful command line interface (the equivalent of the Command Prompt under Windows)‏

    • All programmes can be run from the command line

    • Some useful programmes are command line only

    • It can be a very quick and efficient way to move around and organise directory structures

    • One of the most useful aspects of the command line is command completion


Web and email

Web and Email

  • The systems come with several web browsers and email clients preinstalled

  • Primary web browser is Firefox or Chrome

  • Primary email clients are Thunderbird or Evolution, or you can use the web interface


The text editor is your friend

The text editor is your friend

  • You'll find yourself using a plain text editor a lot during your project.

    • Used for writing code (IDL etc)‏

    • Latex scripting

  • There are few different ones installed, which you'll end up using will probably depend on your supervisor

    • Emacs

    • Kate

    • gedit


The network

The network

  • Linux (and Unix in general) is designed to seamlessly work in a networked environment

  • Your home directory and all the file storage space you'll be using won't be on the machine you're working on

  • You can connect to and run programmes on different machines using SSH


Ms office alternatives

MS Office alternatives

  • If you find yourself needing to open MS office documents, you can use OpenOffice

    • ooffice 'document name' at the command line

    • Under the Office submenu on the Applications menu

  • Evolution is essentially an Outlook replacement.


Remote access

Remote access

  • The AOPP systems are accessable from outside the department using SSH

    ssh ellinga.atm.ox.ac.uk

  • This can be done from Windows

    • "Putty" is a freely downloadable SSH client

    • "WinSCP" is a free SSH file transfer client

  • X-Windows can be opened a remotely connected Windows machine by installing Cygwin-X


If you really need windows

If you really need Windows

  • If you really need access to Windows, it is possible...

    • The Physics Department provides Windows terminal servers

    • You'll need a Physics system login, which you won't get by default

  • You'll have to provide a fairly convincing reason why the local systems aren't adequate


Some basic linux commands

Some basic Linux commands

  • File system commands

    ls : “list” the connets of the current directory

    ls –l –h : detailed listing, with sensible units for file sizes

    cd : Change directory

    • cd ~ : Change to home directory

    • cd bob : Change to the sub-directory “bob” in the current directory

    • cd ~/bob : Change to “bob” in your home directory

    • cd /home/jupiter/eodg/bob/ : Use of absolute path

      cp file1 file2 : Copy file1 to file2

      mv file1 file2 : Move (or rename) file1 to file2

      rm file : delete file


Some basic linux commands1

Some basic Linux commands

  • Utility commands

    top : Provides real time information about processes running on your machine (like the Windows Task Manager)

    less bob : Displays the contents of the file “bob” in the terminal window

    ssh bob : Allows to you log in to the a computer called “bob”

    man bob : Gives you the manual page for the command “bob”

    grep “hello” *.F90 : Searches for the string “hello” in all the Fortran 90 source code files in the current directory


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