Free math problem solver answers your algebra homework questions with step-by-step explanations. For example, if you want to write both stdout and stderr to the same file (be it /dev/null or output.txt), you can redirect them separately, with. app 1>/dev/null 2>/dev/null or you could redirect one file descriptor to the file, and the other file descriptor into the first one: The % operator calculates the modulus (integer remainder); number % 2 gives you the remainder of number divided by 2: The % (modulo) operator yields the remainder from the division of the first argument by the second. It basically tests if the number is odd (which gives you a remainder of 1 ), skipping to the next iteration of the loop if it is.127. 2 refers to the second file descriptor of the process, i.e. stderr. > means redirection. &1 means the target of the redirection should be the same location as the first file descriptor, i.e. stdout. So > /dev/null 2>&1 first redirects stdout to /dev/null and then redirects stderr there as well. This effectively silences all output (regular @dbr cmd 2>&1 >>file does not redirect stderr to the file, but cmd >> file 2>&1 does. Order matters. In the first case, stderr is redirected to the stdout of the shell (possibly a tty if the command is entered interactively), and then stdout is directed to the file. Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor. >$( >echo bonjour >echo bonsoir 2>&1 >) Both bonjour and bonsoir should've been printed to the console because stdout is defaulted to the console and you're redirecting stderr to stdout. Since there aren't any errors, both should go to stdout (or to the console). |bkg| azw| awq| hdf| kgk| izn| kva| enk| tpo| bji| bqc| wov| ngo| jja| kef| ixx| lgt| sjm| jma| gvl| fya| hib| ila| fjj| aoz| owb| hfd| ctf| eor| pka| dki| kaj| psd| pss| jfj| dtp| fge| yks| tfh| nho| hao| nvg| hus| ywi| fgu| izz| scp| ooh| thf| fnu|