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Possible Duplicate:
In the bash shell, what is “ 2>&1 ”?
#echo "[+] Creating $count files"
_remount
create=$((time ./dirtest $testdir $count $size) 2>&1)
It means that the standard error descriptor
stderr(2) is to be redirected to the standard output descriptorstdout(1). Notice that the&ensures that the1is interpreted as a file descriptor and not a filename.