Learn how to correct a shell script and write more
complicated shell scripts.
Part 1:
In order to finish the tasks in this lab, you must connect to snowball server to copy my checkError.sh
$cp
/home/yye10/public/checkError.sh
checkError.sh
In Lab 5, you may have tried the shell script checkError.sh in part 3. However, there are four errors on four different lines in that shell script. Please correct all the four errors by writing down the line
number, the error and the correction as below:
Line #: Error: Correction:
Note: please use cat -n to check the line numbers.
1
Hints:
Following is a sample of the output once all the errors are corrected $ ./checkError.sh ylong4
Try to find out some errors!!!
checkError.sh Result
The result has been sent to ylong4@student.gsu.edu
Congratulations! You have corrected all the errors!
You would also receive an email sent from your snowball account once all the errors are corrected.
You may need to use CTRL-C to terminate the execution of the command, especially for the script file with errors.
Part 2:
Write a single shell script hello.sh which can finish the list of tasks as below:
1. Greet user. E.g. Welcome to computer science society.
2. Contain a comment section with your name, and email address.
3. Print the date.
4. Print the number of directories in /home .
5. Print the value of variables PATH, USER and SHELL.
6. Print your disk usage (df).
7. Print Please, could you loan me $25.00?
8. Print if x = 2, x * x = 4 , x / 2 = 1
9. List all the .sh files with c at the beginning of the file name in current working directory.
10. Tell the user Good bye and the current hour (see manual page of date command refer to the webpage at http://www.thegeekstuff.com/2013/05/date-commandexamples )
Include the content of hello.sh in your answer sheet. Besides, please also upload hello.sh as a separated file.
Hints:
When printing out strings using echo, to escape the special meaning of the meta character, please use back slash \ before the meta-character.
To share files between remote server and the host machine, we can use FileZilla - A FREE FTP. The link to download this application is https://filezillaproject.org/download.php
2
