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Further Reading
● The “Compound Commands” section of the bash man page contains a full de- scription of group command and subshell notations.
● The EXPANSION section of the bash man page contains a subsection covering process substitution.
Further Reading
● The Advanced Bash-Scripting Guide also has a discussion of process substitution: http://tldp.org/LDP/abs/html/process-sub.html
● Linux Journal has two good articles on named pipes. The first, from September 1997:
http://www.linuxjournal.com/article/2156
● and the second, from March 2009: http://www.linuxjournal.com/content/using-named-pipes-fifos-bash