Great article! Thanks! @bros/Soren: I experience the same problem with my bash 2.05b.0. The following does work and demonstrates the principle being described:

cat afile | (ls afile; rm afile; ls afile; head -1)

However, the head command on my system causes STDIN to stop flowing; i.e.:

cat afile | (head -1; head -1)

only returns 1 line:

daemon:x:1:1:Owner of many system processes:/usr/sbin:/bin/sh

A workaround is to replace each 'head -1' with 'read line; echo "$line"' Allen »