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Redirecting Error Output To /dev/null

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Reply Link xuhui November 24, 2014, 1:19 pm Useful for me!!!! Try our newsletter Sign up for our newsletter and get our top new questions delivered to your inbox (see an example). Redirect standard output; overwrite file if it exists >&! These 2 are equivalents: > file and >file. Source

I contribute to various database communities such as Oracle, PostgreSQL, Redis and MongoDB. This is suitable sometimes for cron entries, if you want a command to pass in absolute silence.

 rm -f $(find / -name core) &> /dev/null 
This (thinking on the foo(){ : } 2>&1 | tee foo.log OR #!/bin/bash # My script to do blah ... { command1 command2 } 2>&1 | tee script.log Share this tutorial on:TwitterFacebookGoogle+Download PDF version Found So you need to modify >/dev/null as follows to redirect both output and errors to /dev/null.

Syntax to redirect error and output messages to /dev/null The syntax discussed below works http://askubuntu.com/questions/350208/what-does-2-dev-null-mean

Redirect Stdout And Stderr To Dev Null

For example, this will still output an error message: ps -ef | grep | grep ps > /dev/null 2>&1 Reply Link nixCraft February 2, 2015, 8:14 pm Try: (ps -ef | Powered by Hugo. If you don't specify a number then the standard output stream is assumed but you can also redirect errors > file redirects stdout to file 1> file redirects stdout to file Linux Redirect Error Output To File by Vivek Gite on June 23, 2014 last updated June 23, 2014 in BASH Shell, Linux, UNIX I am a new Ubuntu Linux and bash

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Functions 2>&- The general form of this one is M>&-, where "M" is a file descriptor number. share|improve this answer edited Sep 27 '13 at 12:23 answered Sep 26 '13 at 8:31 sivann 28226 2 There is absolutely nothing wrong if you use 2>/dev/null. Find 2 Dev Null How does the exit command work on a Unix terminal?

Tagged with: > /dev/null 2>&1, cronjobs, I/O redirection, output error messages, redirect stderr to file, redirect stdout to file, standard error, stderr, Easy Next FAQ: FreeBSD: Install bindgraph To Make Graphs Redirect Stderr To Dev Null And Stdout To File Reply Link Shyam November 18, 2015, 4:10 pm Hi, Please tell me how to redirect the output from a script to a log file so that i can save all the Browse other questions tagged command-line grep stdout or ask your own question. How do I redirect the output of stderr to stdout, and then redirect this combined output to /dev/null device?

Follow him on Twitter. 1 Dev Null It redirects file descriptor 2 (STDERR) and descriptor 1 (STDOUT) to /dev/null. >/dev/null This is just an abbreviation for 1>/dev/null. Unix & Linux Stack Exchange works best with JavaScript enabled ≡ Menu Home About Linux Shell Scripting TutoriaL RSS/Feed nixCraft Linux and Unix tutorials for new and seasoned sysadmin. Given that context, you can see the command above is redirecting standard output into /dev/null, which is a place you can dump anything you don’t want (often called the bit-bucket), then

Redirect Stderr To Dev Null And Stdout To File

script says: ping $1 > $1 Please assist if possible Reply Link SilversleevesX July 20, 2010, 4:16 am How reliable, if that's the word I'm looking for, is ending a particular http://www.cyberciti.biz/faq/how-to-redirect-output-and-errors-to-devnull/ You'd have to use different syntaxes to construct similar functions. Redirect Stdout And Stderr To Dev Null Not the answer you're looking for? Redirect Stderr To Dev Null C So… I tried to redirect the stderror & stdout to /dev/null this way: rm * /directory1/directory2/ > 2&>1 /dev/null kept changing /dev/null form a special file & other users need crw-rw-rw-

UNIX is a registered trademark of The Open Group. this contact form Redirecting that file won't do anything. Do I need to turn off camera before switching auto-focus on/off? Using >! Redirect Stderr To Null Windows

Not the answer you're looking for? Unix & Linux Stack Exchange works best with JavaScript enabled current community chat Unix & Linux Unix & Linux Meta your communities Sign up or log in to customize your list. If the square root of two is irrational, why can it be created by dividing two numbers? have a peek here shell io-redirection file-descriptors csh portability share|improve this question edited May 21 '14 at 8:40 Gilles 374k696801129 asked Apr 3 '13 at 1:25 Det 498156 1 Note that, while mksh supports

your complete shell script with multiple echo statements } > 2>&1 | tee -a script.log Reply Link aref ghobadi August 15, 2015, 9:56 am Hi thanks a lot Reply Link karthikeyan Redirect Stdin To /dev/null I also know how to redirect output from display/screen to a file using the following syntax:

cmd > file ls > file However, some time errors are displayed on screen. Tue, Jun 6, 2006 in Programming I remember being confused for a very long time about the trailing garbage in commands I saw in Unix systems, especially while watching compilers do

In the following example, myprog, which was written to read standard input and write standard output, is redirected to read myin and write myout: % myprog < myin > myout You

And why grep -ri? –Radu Rădeanu Sep 26 '13 at 9:02 By the way, he could also be looking for the string /support/security/bulletins/ in the file called content =). more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed See also rc for better designed operators. –Stéphane Chazelas Oct 24 '14 at 9:26 Update: about the performance issue, that's also confirmed here: unix.stackexchange.com/questions/163955/… –Det Apr 16 at 14:24 2 /dev/null Not Working These 2 are equivalents: > file and >file.

A little note for seeing this things: with the less command you can view both stdout (which will remain on the buffer) and the stderr that will be printed on the This site is not affiliated with Linus Torvalds or The Open Group in any way. You can, however, do this: exec 2>/dev/null I wouldn't recommend doing this outside of a script. Check This Out What is a word for deliberate dismissal of some facts?

And avoid redirection in the command itself. I'm Baron Schwartz, the founder and CEO of VividCortex. You can also use >> to append. What have folks' experiences been with the different commands and bash/sh versions when trying it this way?

UNIX is a registered trademark of The Open Group. asked 3 years ago viewed 126722 times active 1 year ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 3 Get current ssh session's originating IP without This site is not affiliated with Linus Torvalds or The Open Group in any way. Sometimes they’re not named, they’re numbered!

This answer seems to belong to another question. –sivann Sep 26 at 15:27 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Connected to 192.168.1.10 (192.168.1.10) ------------------------------------- How can I get rid of "Connection closed by foreign host." ? Cancel reply Leave a Comment Name Email Comment You can use these HTML tags and attributes:

   Receive Email Notifications? I'm much more inclined to put up with circumstances after the fact, and I seldom write anything that's too destructive (on the system or OS/hardware install and performance level, at any 

The length of the null device is always zero. BZT Reply Link josch October 5, 2011, 11:16 pm ciccio, the order of the redirection counts. C Shell Family Some of the forms of redirection for the C shell family are: Character Action > Redirect standard output >& Redirect standard output and standard error < Redirect standard Tagged with: Easy Next FAQ: FreeBSD: (EE) Failed to load module "fbdev" (module does not exist, 0) Error and Solution Previous FAQ: FreeBSD 10: Apply Binary Updates To Keep Base System