Guided Tour (Version 2)
Contents
1. eChecks Each eCheck exercise is given a three character code e g 03A You can check an eCheck exercise by entering the following command at a terminal replace 03A with the particular code java eCheck 03A Your eCheck program will be tested with various inputs If your program passes all the tests your code will be automatically submitted and your mark will be recorded If your program does not pass all the tests output will indicate the given input the expected output and how your program s output differed from the expected one Examine how your program s output is different make the necessary changes to your program and check the exercise again You can check and revise your program as many times as you want before the eCheck s deadline Nothing is submitted until your program passes all tests Submitting Assignments Not all exercises in computer science courses are eChecks You will be required to submit all non eCheck assignments and lab tests To do so you will use the submit command which has the following structure submit course testName yourFilel yourFile2 yourFileN For example submit 1020 LT1 MyProgram java readme txt It is recommended that you submit your files early and often Newer files overwrite those with the same name For more information enter the command man submit ata terminal Guided Tour v 2 Pa CSE 1020 M 2010 11 W oO Nn2. that have a txt extension You can use the wildcard to search for files that match a pattern There are many options for this command such as a to show hidden files and 1 to show file and directory details Enter the command man 1s for further details Guided Tour v 2 Page 2 CSE 1020 M 2010 11 W Command rm fileOrDir Example 1 rm First java Example 2 rm r eChecks Description Removes the file or directory indicated by the argument The first example deletes the file First java The second example note the r option removes directory called eChecks and all of its contents Use this command with caution Command cp orgnl cpy Example cp First java First_backup java Description Copies the file orgnl to the location cpy The example creates a copy of First java called First_backup java Command mv old new Example mv First java Second java Description Moves the file old to the location new This command can also be used to rename files The example renames First java to Second java Command script log Example script Al_log txt Description Records the commands and output generated at the terminal until exit is entered The record is written to a file whose name is passed as an argument Auto Completion and Command History You do not have to type entire filenames or directory paths Type the first couple of characters followed by the TAB key The o
3. Guided Tour Version 2 By Steven Castellucci This document was inspired by the Guided Tour written by Professor H Roumani His version of the tour can be accessed at the following URL http www cse yorku ca roumani jbaY ork GuidedTour pdf You will need a CSE account to complete this tour See the Lab Monitor in room CSEB 1006 to get an account Bring your student number and photo identification e g YorkU Card drivers licence etc The Xfce Linux Desktop Workspaces Firefox and Thunderbird Terminal Applications Menu Applications Menu For a list of available applications click the Xfce icon or right click the desktop An application can be started by selecting it from the menu In addition to Firefox and Thunderbird other applications include NEdit a text editor with which to write programs Acrobat Reader to view and print PDF files and OpenOffice to create edit and print Office documents You can also log out by selecting Quit at the bottom of the menu and clicking OK Terminal The terminal also known as the console or the command line allows you to enter commands You will use the terminal to compile run and submit your programs It is the most versatile operating system component that you will use in computer science Starting Firefox and Thunderbird The Firefox Internet browser and the Thunderbird email client can be started with a single click Firefox is configured with department specific b
4. mport java util Scanner import java io PrintStream public class First publiG static void main String args Scanner input new Scanner System in PrintStream output System out output printlin My name is Replace with your name Save your program Compile it by entering javac First java ata terminal note the c in javac The compiler will identify the type and location of any syntax errors Correct any errors in your code save your changes and recompile your code Enter java First atthe terminal to run your program do not type the java extension Your program should output My name is followed by your name Guided Tour v 2 Page 4 CSE 1020 M 2010 11 W Configuring eCheck Your weekly lab assignments will take the form of eChecks programs that are checked electronically You will learn more about eChecks in the textbook However you must first configure the eCheck program that checks your code Enter the command java Options ata terminal Py y Options version 6A x ri Work Offline mo marks will be recorded Login ID x Password eCheck URL ww CS yorku ca rous ani type ec ec cg Cancel Apply Uncheck Work Offline Enter your CSE username password and the following URL http www cse yorku ca roumani type ec ec cgi Double check that you entered the URL correctly When you are finished click Apply Submitting
5. ookmarks while Thunderbird is configured to access your CSE mail account Guided Tour v 2 Page 1 CSE 1020 M 2010 11 W Workspaces The operating system s desktop is where you can arrange your application windows With Xfce you can arrange you windows across four by default virtual desktops also known as workspaces Although you can only work with one at a time the applications on all workspaces remain running To switch between workspaces you can click on the thumbnail images Alternatively you can scroll the mouse wheel on an empty portion of the desktop Even if you do not use the extra workspaces make sure that you do not accidentally switch to them as you work Focusing with the Mouse With Windows you indicate the active window by clicking within it The window remains active until you minimize it or select another window However with Xfce the active window is the one that contains the mouse pointer If you move your mouse pointer to another window the new window becomes the active one For example if you want to type a command in a terminal you must first position your mouse within its window If as you type your mouse pointer moves outside of the terminal window the terminal will not receive your keystrokes Simple Commands Command pwd Example pwd Description Displays the current directory a k a working directory The same output can be seen a terminal window title bar Command man command Exam
6. perating system will complete the rest of the name or path If there are multiple matches the operating system will complete only the common portion You will have to type additional characters to identify the desired file or directory To repeat a command at a terminal you can use the up and down arrow keys to cycle through commands you previously entered This can be very beneficial during labs and lab tests as you will repeatedly compile and run your program to test it Creating and Editing Text Files To create and edit your programs in 1020 I recommend you use a text editor called NEdit Other text editors are installed on the system such as Pico Emacs and Vim However NEdit is considered the most user friendly To start NEdit you can select it from the applications menu or enter nedit amp ata terminal Optionally you can include a filename e g nedit First java amp Ifthe file already exists it will be opened automatically If not the file will be created When testing a program its content will be referenced by line number Under the Preferences menu click on Default Settings and then select Show Line Numbers This will show the line numbers along the left margin Under the same Default Settings menu select the option Show Matching and set it to ON This will help you avoid putting too many or too few parenthesises in your code Again under the Preference menu select Save Defaults and click OK This will save your p
7. ple man submit Description Displays the user manual for the passed command The user manual details the type and number of arguments required by the command and lists all the available command options To scroll through the user manual press the spacebar To exit the user manual simply press the Q key Command mkdir dirName Example mkdir eChecks Description Creates a subdirectory with the passed name in the current directory The example creates a subdirectory called eChecks Command cd dirName Example 1 cd Example2 cd Example 3 cd mail Description Without any argument Example 1 this command changes the working directory to your home directory equivalent to the My Documents folder in Windows With the argument Example 2 this command changes the working directory to the parent directory If you provide the name of a subdirectory as an argument Example 3 this command changes the working directory to be that subdirectory e g the subdirectory called mail Command 1s dirName Example 1 1s Example 2 1s mail Example3 1s txt Description Lists the contents of the directory specified by the argument Without any arguments Example 1 this command lists the visible contents of the working directory If the argument is a directory name Example 2 this command lists the visible contents of that directory e g the subdirectory called mail Example 3 lists all files in the current directory
8. references Guided Tour v 2 Pa CSE 1020 M 2010 11 W da oO UJ Printing Files Included in your course fee is a print quota of 500 pages To display the number of pages remaining in your quota enter the command pquota ata terminal Typically you can print an open file by selecting Print from the File menu After you send the file to be printed go to any print station in room CSEB 1004 or 1006 Touch the screen to activate it Enter your CSE username and password using the attached keyboard Ensure that the files you want printed are selected and press the print icon in the bottom left corner To exit without printing press the exit icon If you experience any printing problems contact the lab monitor yeivescitt PRINT RELEASE STATION AEAEE PRINT RELEASE STATION YO R K Department of Computer Science and Cagineering YO R K i Goportment of Computer Sconce and Cnemmeniing Please Log In To Print Prin Time Size Files 19 wW 3s 73759 smbpm 00007795 Xho Username Password acces 1il 1 of 1 job is selected for printing Waiting For Identification 4 Touch an entry to select or unselvet it EXIT Creating a Java Program Before you can run a Java program you need to write its code compile it and correct any syntax errors If you have not yet done so read the above section Creating and Editing Text Files Create a new text file named First java with the following content i
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