Hi All,

In my script, I want to read input from another file. The input file contains many lines, however, I only want read certain specific lines as input.

example: input.txt

test1
test2
test3
bad1
bad2
bad3

In my script, when I use the read command like this:

while read line
do

the entire input file is read, all 6 lines. How can I specify only certain lines as input? Lets say, I only want first 3 lines as input, how can I do that?

Thanks in advance.

you can do that by selecting the lines into a variable

ex:

# here you get the first 3 lines from your file
lp_lines=`cat input.txt|head -3`

# here you read the each line from the selected in a loop
for l_line in ${lp_lines};
do
----done your process here--
done


is it ok....

Or in the same vein:

or even