Comments on: Time – Run Programs and Summarize System Resource Usage http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/ Enhancing your Ubuntu experience! Fri, 11 May 2012 05:04:26 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: wlevels http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-10566 wlevels Fri, 05 Feb 2010 14:10:49 +0000 http://ubuntu-tutorials.com/?p=448#comment-10566 Tried time command to get it to work with a tar command, won't work :( tells me "time: cannot run tar. Command exited with non-zero status 127 Anybody got an idea? Tried time command to get it to work with a tar command, won’t work :( tells me “time: cannot run tar. Command exited with non-zero status 127

Anybody got an idea?

]]> By: a http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-8048 a Sat, 07 Mar 2009 20:25:02 +0000 http://ubuntu-tutorials.com/?p=448#comment-8048 Just what I was looking for, thanks! Hit #3 when I googled ubuntu time command Just what I was looking for, thanks! Hit #3 when I googled ubuntu time command

]]> By: devnull http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2419 devnull Thu, 27 Sep 2007 10:50:46 +0000 http://ubuntu-tutorials.com/?p=448#comment-2419 I agree MadMike. Was just about to post the same thing. I hope noone 'gives it a try' before understanding what will happen to /dev/sdb :) I agree MadMike. Was just about to post the same thing. I hope noone ‘gives it a try’ before understanding what will happen to /dev/sdb :)

]]> By: MadMike http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2417 MadMike Tue, 25 Sep 2007 09:19:08 +0000 http://ubuntu-tutorials.com/?p=448#comment-2417 You should really mention that your example will overwrite and erase all data on /dev/sdb. Else, some unsuspecting reader loose valuable data. Also: psuedo-random -> pseudo-random You should really mention that your example will overwrite and erase all data on /dev/sdb. Else, some unsuspecting reader loose valuable data.

Also: psuedo-random -> pseudo-random

]]> By: the polarizer http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2416 the polarizer Tue, 25 Sep 2007 07:58:23 +0000 http://ubuntu-tutorials.com/?p=448#comment-2416 @mlissner: For basic commands in linux try a "man bash" and search for "SHELL BUILTIN COMMANDS". Another good idea is to use "apropos time" if you need such things on the console. @mlissner: For basic commands in linux try a “man bash” and search for “SHELL BUILTIN COMMANDS”. Another good idea is to use “apropos time” if you need such things on the console.

]]> By: Dirk Eddelbuettel http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2415 Dirk Eddelbuettel Mon, 24 Sep 2007 01:27:43 +0000 http://ubuntu-tutorials.com/?p=448#comment-2415 You failed to point out the difference between 'time' (usually the bash builtin) and /usr/bin/time (aka the GNU time binary). As a long-time Debian maintainer for GNU time (but alas no longer the current maintainer) I can assure you that half the bug reports fell into that trap. Cheers, Dirk You failed to point out the difference between ‘time’ (usually the bash builtin) and /usr/bin/time (aka the GNU time binary). As a long-time Debian maintainer for GNU time (but alas no longer the current maintainer) I can assure you that half the bug reports fell into that trap.

Cheers, Dirk

]]> By: Adrian Bunk http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2414 Adrian Bunk Sun, 23 Sep 2007 19:07:07 +0000 http://ubuntu-tutorials.com/?p=448#comment-2414 The "time command is a nice tool, but there are problems with your example, more exactly with what you are measuring. It is not exactly correct this would show "how long it took to write psuedo-random data to a 6G USB disk": - Depending on how the disk is mounted, part of the data might not yet have been written to the disk but only cached in RAM when the end time gets measured. - /dev/urandom is slower than typical USB disks so you actually measure the speed of /dev/urandom, not the speed of the disk. The “time command is a nice tool, but there are problems with your example, more exactly with what you are measuring. It is not exactly correct this would show “how long it took to write psuedo-random data to a 6G USB disk”:

- Depending on how the disk is mounted, part of the data might not yet have been written to the disk but only cached in RAM when the end time gets measured.

- /dev/urandom is slower than typical USB disks so you actually measure the speed of /dev/urandom, not the speed of the disk.

]]> By: mlissner http://ubuntu-tutorials.com/2007/09/23/time-run-programs-and-summarize-system-resource-usage/#comment-2418 mlissner Sun, 23 Sep 2007 17:53:34 +0000 http://ubuntu-tutorials.com/?p=448#comment-2418 You have no idea how long this command took me to find about two weeks ago when I needed it. I almost wrote a script to use date, bc and awk to accomplish the same task. Some of these really basic commands are nearly impossible to find (ie, you can't google the word time and hope to get anything useful). Thanks! You have no idea how long this command took me to find about two weeks ago when I needed it. I almost wrote a script to use date, bc and awk to accomplish the same task.

Some of these really basic commands are nearly impossible to find (ie, you can’t google the word time and hope to get anything useful).

Thanks!

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