UNIX for Dummies Questions & Answers

I have the following script that greps lines containing "AT" from data files data1.hsq through data1000.hsq, then cuts their second column and puts in data files called perm1 through perm1000.

I want to modify the script so that instead of putting the data in separate data files perm1 through perm1000, it concatenates them into a single data file. So essentially the same effect as using cat to concatenate perm1 through perm1000. How do I go about doing that? Thanks!

Code:

for i in {1..1000}
do
grep "AT"  data$i.hsq | cut -f2 > perm$i
done

try:

Code:

for i in {1..1000}
do
grep "AT"  data$i.hsq | cut -f2
done >> new_file

Code:

awk -F'\t' '/AT/{print $2}' data{1..1000}.hsq > datafile

---------- Post updated at 11:19 AM ---------- Previous update was at 11:11 AM ----------

newfile will remain open for the duration of the loop so there is no need to use >> unless it is required to append all the data written to standard output by the loop statements, to the already existing file new_file.