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Hi,
I have lets say 10 files , I need to process them one by one.
So I need a command to get one file name at a time to process it into a variable

Example
Files
P1111.dat
P3344.dat...

Unfortuantely,
I am not able to use the sed -i but

I am also getting error while using the following command
$lines has the string I want to modify

write=`echo "$lines" | awk...

thanks for your update,

I would probably do this for now
read every line paste it in the new file if it doesn't match with my conditions.

if it does match paste the $line | awk command into...

Can it be done without using a new_file ?

I mean updating the same file is that possible?

Please Advice

Thanks

I have a file which has huge number of rows.

I have to mask only few rows at a particular position lets say 12th to 19th i have to replace with X's (XXXXXXX)

I am reading the file and even...

perfect !!

just replaced

echo $line with echo "$line" | awk '{print substr($0,4,3)}'


Thanks a lot..

I have a string which is something like this..

abcd efghijkl

when I use this using substring() function 2 spaces are bein considered as one starngely.

Is there any thing I am doing...