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You can use the ampersand (&) after the command to put it in the background. If you want 3 instances of it running in the background, you could do the following: ./a.out& ./a.out& ./a.out& note it doesn't have to immediately follow the command, the following will do the same thing as well: ./a.out & ./a.out & ./a.out & You ...


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For low level: (sudo) blktrace -d /dev/sda -o - | blkparse -i - For high level: atop. It gather stats every 10 min (default) and save them to disk. You can browse results later with atop -r /var/log/atop/atop_file (t/T to move forward/back).



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