My goal is to create a simple echo server using nc and a single fifo. I'm not looking for the best way to do it, I'm merely trying to understand the semantics of the following commands (when does fork ...
If I do: diff <(cat old) <(cat new) Hoe does that work internally for the diff program? And how I do the same trick with a bash script?
This is what I usually do to run grep and wc on a file without having to scan it twice <file.txt tee >(grep LITERAL) >(wc -l) >/dev/null However, this yields EXEC LITERAL 32 ...
Consider the following snippet of Bash script: exec 3> >(sleep 1; echo "$BASHPID: here") do-something-interesting exec 3>&- wait $! echo "$BASHPID: there" When executed, it produces: ...
I have a big script which takes a file as input and does various stuff with it. Here is a test version: echo "cat: $1" cat $1 echo "grep: $1" grep hello $1 echo "sed: $1" sed 's/hello/world/g' $1 I ...
I was wondering how to understand the following: Piping the stdout of a command into the stdin of another is a powerful technique. But, what if you need to pipe the stdout of multiple ...