Hi list,
A silly question here:
A simple list I wrote to test
=====================
$ cat test
#!/usr/bin/sh
#
while true;
do
echo hello
echo ""
sleep 2
done
=====================
if I run it as the following:
$ ./test > tmp.txt
of course I can get something from tmp.txt file
And if I run it as
[aubrey-...@~]./test | sed '/^$/d'
hello
hello
hello
Blank line will be filtered by sed, but if I run it as
[aubrey-...@~]./test | sed '/^$/d' > tmp.txt
Nothing is in the tmp.txt.
What's wrong I did?
Thanks,
-Aubrey
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