Hi, md5sum was made line buffered sometime back. However, cksum was left out of that patch. I tried running the following test on my machine for cksum, on the lines of test for md5sum, given in bug archives at: http://lists.gnu.org/archive/html/bug-coreutils/2009-10/msg00190.html. The test failed. Shouldn't cksum too be made line buffered? anoop@Aspire:~$ find / -type f 2>/dev/null | xargs -P2 -n 50 cksum 2>/dev/null | sed -n '/^[0-9]\{1,\} [0-9]\{1,\}/!p' decs/snd-soc-da7210.ko 24-generic/kernel/drivers/staging/comedi/drivers/pcm3724.ko /modules/3.2.0-24-generic/kernel/drivers/staging/comedi/drivers/pcmad.ko a/video/gspca/gspca_spca1528.ko el/drivers/staging/comedi/drivers/c6xdigio.ko /dvb-usb-gl861.ko nel/drivers/media/common/tuners/tda18271.ko vers/media/rc/ite-cir.ko ^C anoop@Aspire:~$ ^C Thanks, Anoop