need help for shell programming


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting need help for shell programming
# 1  
Old 04-02-2008
need help for shell programming

My purpose was to print out all of name of students in a list.First of all,I created a file name "List" in /home/tuan/Desktop/Shell_programming as below
Code:
Tom
Henry
Ben
Linda
Marry

And my script "script" is
Code:
#!/bin/sh
path=/home/tuan/Desktop/Shell_programming/List
for student in $path
do 
echo "$student"
done

At terminal I did :
Code:
tuan@tuan:~/Desktop/Shell_programming$ chmod +x script
tuan@tuan:~/Desktop/Shell_programming$ /.script
tuan@tuan:~/Desktop/Shell_programming$ ./script
/home/tuan/Desktop/Shell_programming/List
tuan@tuan:~/Desktop/Shell_programming$

Why after executing, the script displayed
Code:
/home/tuan/Desktop/Shell_programming/List

If I would like to print out the name of student. What should I change the code for my script
# 2  
Old 04-02-2008
First try changing yourself with someone who knows unix-shell before writing shell-scripts or at least someone who learns first and then writes code

Then, maybe change "$path" to `cat $path` in the for-statement
# 3  
Old 04-02-2008
Hammer & Screwdriver suggestion on variable names

I would strongly recommend against using unix keywords as variable names. The word "path" is used for storing locations to find programs for a user. Try typing:
Code:
echo $PATH

to see what I mean.

Yes, uppercase vs. lowercase, but just a matter of there are enough places to make mistakes in unix scripting without causing an extra headache for yourself.

Also, take a look at the following:
Code:
> cat listingnm 
Tom
Henry
Ben
Linda
Marry

Code:
> cat listcontents 
#! /bin/bash

filesrch=listingnm
while read student
   do 
   echo "$student"
done < $filesrch

and the program execution
Code:
> listcontents 
Tom
Henry
Ben
Linda
Marry

# 4  
Old 04-02-2008
@joeyg:thanks for your advice. It is helpful.
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Shell Programming

Hi, I am using two files - one file contains list of service name , other file contains commands for each of these service name . I have to read each service name and check this string in 1.cfg file , if it exists , then i have to read another file (commands file ) and take the string and... (2 Replies)
Discussion started by: santhoshks
2 Replies

2. UNIX for Dummies Questions & Answers

Shell script to read lines in a text file and filter user data Shell Programming and Scripting

sxsaaas (3 Replies)
Discussion started by: VikrantD
3 Replies

3. Shell Programming and Scripting

Shell programming

Hi every one,i am new to unix.Can any one tell me about shell programming.. (1 Reply)
Discussion started by: martina100011
1 Replies

4. Shell Programming and Scripting

SHELL PROGRAMMING

Using shell scripting, implement ‘scan.sh' that scans the file system recursively starting from current working directory and generates the file ‘index.txt' that contains a line for each file (or directory) with following fields in tab separated format: 1. The full path of the directory... (1 Reply)
Discussion started by: kranthikiran
1 Replies

5. Shell Programming and Scripting

Shell programming

Hi, Iam new to shell program, I want to check a file which is having same lines 2 times and i want to display it in a seperate file. File format is : AQWERTYU|1234567890 ASDFGHJK|0987654321 ZXCVBNML|1098576453 AQWERTYU|1234567890 I need to take the 1st and 4th lines in the above... (5 Replies)
Discussion started by: nivas
5 Replies

6. Shell Programming and Scripting

{} in shell programming

Could someone please tell me what {} mean when they surround a variable? For instance, $FILE = 'basename $1' //what is passed into this script $BANK = 'dirname $1' $INFILE = ${FILE}.${BANK}.$$ What does $INFILE contain after this assignment? Please let me know Thanks G (4 Replies)
Discussion started by: vgirijanaidu
4 Replies

7. Shell Programming and Scripting

shell programming

I want notes for learning Shell programming (2 Replies)
Discussion started by: Neha Agarwal
2 Replies

8. Shell Programming and Scripting

Shell Programming?

For what purposes should we use shell /what are the tasks we can achieve using shell which is best book to learn shell programming and will nayone tell me diff between shell programming aand shell scripting? Thank u in advance. (1 Reply)
Discussion started by: shrikrishna
1 Replies

9. UNIX for Dummies Questions & Answers

Shell Programming Help

Hi, I am new to shell programming, and hve been given a request to write a shell script. Is there any good places to go to see examples of how to write shell programming scripts? Thanks (4 Replies)
Discussion started by: mec585858
4 Replies

10. UNIX for Dummies Questions & Answers

Shell Programming

I have a fix_table.ksh script that takes a TABLENAME and a date. So, in jk_table_file.txt I have the tables...one per line, and in jk_out_file.txt I have the date in the format I need. The following doesn not 'want' to work in a shell script... for TABLE in `cat jk_table_file.txt`; do ... (2 Replies)
Discussion started by: JWK1
2 Replies
Login or Register to Ask a Question