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Thanks. The output is same as expected.

Using grep -o in linux, it gives the list wherever the pattern appears. The file
input_file has "Hello World
Hi Hello Hello Hello
Hello
Bye
"
for eg: grep -o "Hello" input_file
Hello
Hello...

i don't want to check in a loop using isdigit. need something simple.

Hi,

how to check the given string is numeric or not , without converting ( using strtol...).

for ex: if string is C01 - non-numeric data
if string is 001 - numeric data

TIA

cd dir1
for file_name in `ls *.a`
do
ln -s $file_name dir2/$file_name
done

How to do in HP-UNIX and SCO?.