Request for file read option in Unix shell scripting

vinoth124 · #1 (**permalink**) 06-01-11, 13:10

Hi Friends,

I would like to read all the record from one txt file to other file txt

For example I have two txt file a.txt and b.txt. I need to read a.txt record by record and I need add the system date @ end of each record before moving it to b.txt. Could you please share the coding for this, I am very much new to this language. Thanks in advance.

Regards,
Vinoth R

Pat Phelan · #2 (**permalink**) 06-01-11, 14:35

Code:

gawk "{print $0 strftime() }" a.txt >>b.txt

-PatP

kitaman · #3 (**permalink**) 06-01-11, 14:38

Code:

while read line
do
  echo $line `date` >>b.txt
done <a.txt

Notes.
If the input file is large enough, or the machine is slow enough, the value of the date may change.
If you want the date to be the same throughout the run:

Code:

date=`date`
while read line
do
  echo $line $date >>b.txt
done <a.txt

If you want to erase b.txt for each run, add

Code:

echo "\c" >b.txt

at the beginning.

pdreyer · #4 (**permalink**) 06-02-11, 03:12

And another way using sed
sed "s/$/ `date`/" a.txt >b.txt

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