Visit Our UNIX and Linux User Community


Read and store each line of a file to a variable


 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Read and store each line of a file to a variable
# 1  
Old 06-13-2007
Read and store each line of a file to a variable

Hi all,

I'm quite new to unix and hope that someone can help me on this.
I'm using csh.
Below is what i intend to do.
1. I stored some data in a file.
2. I intend to read the file line by line and store each line of data into a variable, so that i can used it later.

Anyone have any suggestion how this can be done?
Pls help. Thanks.

Regards.
# 2  
Old 06-14-2007
please use the search function, this same question has been asked many times
# 3  
Old 06-14-2007
Quote:
Originally Posted by seijihiko
Hi all,

I'm quite new to unix and hope that someone can help me on this.
I'm using csh.

http://www.grymoire.com/Unix/CshTop10.txt
http://www.grymoire.com/Unix/Csh.html#uh-0
http://www.faqs.org/faqs/unix-faq/shell/csh-whynot/

Quote:
Below is what i intend to do.
1. I stored some data in a file.
2. I intend to read the file line by line and store each line of data into a variable, so that i can used it later.

In a shell that has arrays (e.g., bash, ksh93):

Code:
IFS='
'
file=( $( cat "$FILE" ) )

However, that will probably be no better than reading the file when you need it.

If you need to store it in variables that depend on the contents of each line:
Code:
while IFS= read -r line
do
   ## check for criteria and store in variable here
done < "$FILE"


# 4  
Old 06-14-2007
reading line and storing number

usage of perl for reading files and doing string related operation is much powerful and easy
U can achieve the same using sed or awk or using shell scripts
This was just a suggestion

Best Regards,
Rakesh UV
# 5  
Old 06-17-2007
can use awk

Hi,
I think you can use AWK.(I am a newer also)Smilie

awk 'BEGIN{
i=1
}
{var[++i]=$0}
END{
for (a in var)
print var[a]
}'

Pls try!
This User Gave Thanks to summer_cherry For This Post:
 

Previous Thread | Next Thread
Test Your Knowledge in Computers #113
Difficulty: Easy
Linux is not Unix per se, but Linux is a Unix-like operating system.
True or False?

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Do While Loop + Read From File + assign line to a variable

Hello, I am using below code for reading from a file and assigning the values to a variable , but it is loosing the value after the loop , please suggest to retain the value of the variable after the loop , while IFS=: read -r line do set $dsc=$line echo 'printing line variable ' $line... (1 Reply)
Discussion started by: ParthThakkar
1 Replies

2. Shell Programming and Scripting

How to read a value from a file and store in a variable?

Hi, I have a file service.xml which has following content: <?xml version="1.0" encoding="UTF-8"?> <Service Ver="2.31.13"/> I want to read the value of Ver (that is 2.31.13) and assign to a variable which i further use. Please help me in that. (3 Replies)
Discussion started by: laxmikant15
3 Replies

3. Shell Programming and Scripting

Read line by line and store a word in array

Hi, I would like to read a file line by line and then store the whole line word by word in array so that I can do specific manipulation on each word. $ cat test.txt hello how are you i am good I would like to have an array created dynamically so that first time , the... (4 Replies)
Discussion started by: ashwin3086
4 Replies

4. Shell Programming and Scripting

How to read a file line by line and store it in a variable to execute a program ?

Hello, I am quite new in shell scripting and I would like to write a little scritp to run a program on some parameters files. all my parameters files are in the same directory, so pick them up with ls *.para >>dirafter that I have a dir file like that: param1.para param2.para etc... I... (2 Replies)
Discussion started by: shadok
2 Replies

5. Shell Programming and Scripting

Read the contents of a file and store them in a variable

Hi Gurus, I am trying for a scenario where in I want to read the contents of a file line by line and then store them in variables. Below is the script: #!/bin/ksh while read line do id=`echo $line | cut -f1 -d |` name=`echo $line | cut -f2 -d |` echo $id ... (11 Replies)
Discussion started by: svajhala
11 Replies

6. Shell Programming and Scripting

how to Read a file and assigning each line to a variable?

Friends, I have a file output.txt with values as below: 092307135717 061910135717 I want to know how to read this file and then assign each value to a variable. say like var1=092307135717 var2=061910135717 So that I can use this VAR1 and Var2 in the shell script for further processing.... (3 Replies)
Discussion started by: shyamaladevi
3 Replies

7. Shell Programming and Scripting

read xml tag attribute and store it in variable

Hi, How to read xml tag attributes and store into variable in shell script? Thanks, Swetha (5 Replies)
Discussion started by: swetha123
5 Replies

8. UNIX for Dummies Questions & Answers

Read a file and store each value in a variable

Hi, How to read a file and put the values in a script. E.g. file1.txt 02/12/2009;t1;t2 The script should read this file and put these values in 3 different variables x1,x2,x3 which can be used further. Thanks Ashu (3 Replies)
Discussion started by: er_ashu
3 Replies

9. Shell Programming and Scripting

store the first line of a file in a variable

i have to store the files in a folder and assign a variable to the the files. (0 Replies)
Discussion started by: dineshr85
0 Replies

10. UNIX for Advanced & Expert Users

how to read each letter from file and store it in variable.

Dear friends, i am writing csh script i have one dat file containing following data.like this. 08FD3 03A26 000FA0 FFFF0 BBA0F 00000 00000 from the above file i want to read each letter and store it in one variable. how it is possible. please help (7 Replies)
Discussion started by: rajan_ka1
7 Replies

Featured Tech Videos