Add column to a file

Shell Programming and Scripting
1

Hola,
How can I add a column to a existing file??

PS: The column which should be added need to be the first column and it will be a parameter from the script.
Example:
1 name1
2 name2
3 name3
4 name3

Need to add parameter $file as a first column. $file is a file name with time stamp which will be same for all the rows.

Thanks
Olivia

2

I'm not sure if that's your input data, or your output data.

We really need to see both to understand what you want.

3 
file=<filename with timestamp>

while read LINE
do 
    echo "$file $LINE" >> temp_file.txt
    
done < input_file 

temp_file.txt > input_file

As Corona688 has said, we will only get a better idea of what you want if you post more details.
This is what I roughly understood from your post.

4

Apologize, I was not clear

That's is input
my output should be

$File 1 name1
$File 2 name2
$File 3 name3
$File 4 name4

$File is the file name generated from the script.

---------- Post updated at 04:17 PM ---------- Previous update was at 04:10 PM ----------

Thank you both yeah, thats exactly what I am looking for :slight_smile: i appreciate your help.

---------- Post updated at 04:57 PM ---------- Previous update was at 04:17 PM ----------

Yeah it worked but is there any other way as because it's been adding first column to the blank rows too :frowning:

5

Show us a representative sample of your input, then, and a representative sample of your output.

6

for your previous post ..

$ awk '{print "filename"$0}' infile

As Corona said, post sample i/p and o/p content to proceed further ..

7

Hi.

cheers, drl

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