Question
You have seen "<(" in Linux. What does it do?
Answer
A command encapsulated in parens and having the "<" symbol on the left is a way to do process substitution.
Here is an example:
diff <(hostname -f) <(date)The diff command can compare the results of two different commands. To read more about process substitution, see this posting: https://tldp.org/LDP/abs/html/process-sub.html