I have a bash shell script in which I pipe some data through about 5 or 6 different programs then the final results into a tab delimited file.
I then do the same again for a separate similar dataset and output to a second file.
Then both files are input into another program for comparative analysis. e.g. to simplify
Data1 | this | that |theother | grep |sed | awk |whatever > Data1Res.csv Data2 | this | that |theother | grep |sed | awk |whatever > Data2Res.csv AnalysisProg -i Data1res.csv Data2res.csv
My question is : how can I make step1 and step2 run at the same time (e.g. using &) but only launch step3 (AnalysisProg) when both are complete?
ps AnalysisProg will not work on a stream or fifo.