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linuxparallel-processingmd5sum
Vikram Dattu
Vikram Dattu

Reputation: 881

Create md5sum of file parallel to file dump

My C program creates output file out.txt.

I've to create md5sum of it.

I know that the command is md5sum out.txt > md5sum.txt.

What I want is not to create whole out.txt and then md5sum out.txt.

I want both operations to run parallely. Md5sum should be created while file is dumped. So that I could save some time.

Something like,

./program > out.txt &
md5sum out.txt > md5sum.txt &
wait

Is there a valid way to do this ? Please help.

Upvotes: 0

Views: 326

Answers (2)

Chetan Khilosiya
Chetan Khilosiya

Reputation: 541

If you only want the checksum of file then you can use pipeline.
like ./program | md5sum > md5sum.txt
But in this way you will loose output file. You can use following syntax
./program | tee > out.txt | md5sum > md5sum.txt
This will create out.txt file and also calculate md5sum whose output goes to md5sum.txt

Upvotes: 2

Tejas
Tejas

Reputation: 257

./program | md5sum > md5sum.txt

This should work for you :).

When you write A | B, both processes already run in parallel.

Upvotes: 1

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