Apply argument to all files in directory

Shell Programming and Scripting
1

Hi all:

i need to run a rather simple command-line argument:

head -200 input > output

However, I need to do it on several files, all in the same directory.

Is this possible?

2

If you want all of them to go to the same output file, use head with a pattern that matches all the files you target. For individual output files, use a for loop with resp. pattern.

EDIT: BTW - man head is your friend!

3

first do an "ls" on the files in the directory which u need to check the head.

Then loop the file names

#!/bin/bash
cd input_directory
ls -ltr | awk '{print $9}' | sed '/^$/d' > result.txt
while read line
do
head -200 $line >> output_file
done < result.txt