paste without temporary files in Unix
You do not need temp files under bash, try this:
paste <(./progA) <(./progB)See "Process Substitution" in the Bash manual.
Holy moly, I recent found out that in some instances, you can get your process substitution to work if you set the following inside of a bash script (should you need to):
set +o posix
http://www.linuxjournal.com/content/shell-process-redirection
From link:"Process substitution is not a POSIX compliant feature and so it may have to be enabled via: set +o posix"I was stuck for many hours, until I had done this. Here's hoping that this additional tidbit will help.