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7
votes
3answers
1k views

tee + cat: use an output several times and then concatenate results

If I call some command, for instance an echo I can use the results from that command in several other commands with tee. Example: echo "Hello world!" | tee >(command1) >(command2) ...
7
votes
4answers
3k views

using parallel to process unique input files to unique output files

I have a shell scripting problem where I'm given a directory full of input files (each file containing many input lines), and I need to process them individually, redirecting each of their outputs to ...
3
votes
1answer
62 views

How can the order of execution in the shell as it relates to redirection be upset about 1 time out of a 1000 on my system? [duplicate]

Considering this Q&A about the order of execution in the shell as it relates to redirection, and despite the fact that if a file doesn't exist it gets created first so that cat example.txt | shuf ...