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Redirect Standard Error To Devnull

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Reply Link Martin June 2, 2014, 4:23 am You could use find instead to filter out the files you don't want to delete, or only delete files matching a patter: Delete I have this command: Code: du -h -c ~ | grep total and when I execute it, it sometimes show errors like : du: cannot read directory `bla': Permission denied and Now, if you execute the command uptime in the cornjob as follows: uptime >/dev/null 2>&1 2>&1 means a redirection of the chanel 2 (stderr) to the chanel 1 (stdout). Notation: SPACE(n) vs SPACE(O(n)) How to explain the use of high-tech bows instead of guns Logical && statement with null validation Should non-native speakers get extra time to compose exam answers? have a peek at this web-site

Why do composite foreign keys need a separate unique constraint? Both outputs are now on the same chanel (1). >/dev/null: means that the standard output (and the standard error output) is sent to /dev/null. /dev/null is a special file: Data written The length of the null device is always zero. Should I define the relations between tables in database or just in code?

Redirect Stdout And Stderr To Dev Null

Privacy - Terms of Service - Questions or Comments Next Previous Contents 3. 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 UNIX is a registered trademark of The Open Group.

Tango Icons Tango Desktop Project. asked 4 years ago viewed 119889 times active 3 months ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Get the weekly newsletter! How to explain the concept of test automation to a team that only knows manual testing? /dev/null 2 &1 In Linux Does catching/throwing exceptions render an otherwise pure method to be impure?

Include both the Standard Error and Standard Out. 2 /dev/null In Unix 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 share|improve this answer edited Jul 12 at 9:48 Ömer An 618 answered Jun 8 '13 at 6:29 Christian 1 add a comment| Your Answer draft saved draft discarded Sign up read this article Does the local network need to be hacked first for IoT devices to be accesible?

Tagged with: redirect stderr stdout to file, redirect stderr to file, stderr, Easy Next FAQ: sed Tip: Delete All Blank White Spaces Previous FAQ: Ubuntu Linux: Turn On Exec-Shield Buffer Overflow Redirect Stderr To Dev Null C I know it's not recommended, but for someone like myself, with scripts they either run daily or don't run for months and then go through a spate of executing them two 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 Reply Link ma thesh February 2, 2015, 6:16 pm How to get the error help in shell window Reply Link Alex October 19, 2015, 10:02 am Thanks!

2 /dev/null In Unix

file iplist has a long list of IP's on the network and i need to send this to a script that creates a file with the ping info. 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 Redirect Stdout And Stderr To Dev Null UNIX is a registered trademark of The Open Group. 1 Dev Null Conventionally, file descriptor '1' is standard output (a.k.a.

What is the meaning of the 90/10 rule of program optimization? Check This Out STDERR) if a number isn't explicitly given, then number 1 is assumed by the shell (bash) First let's tackle the function of these. Reply Link neonatus October 17, 2012, 7:29 pm @smilyface you can close (omit) the stderr output from telnet command echo “open 192.168.1.10 8080″| telnet 2>&- | grep –color=auto “Connected to” Reply How to slow down sessions? Redirect Stderr To Dev Null And Stdout To File

Ubuntu Logo, Ubuntu and Canonical Canonical Ltd. Redirecting that file won't do anything. Re: Redirecting stderr to dev null ?? Source It redirects file descriptor 1 (STDOUT) to /dev/null.

Please enable JavaScript to submit this form. & Dev Null share|improve this answer answered May 13 '13 at 7:39 Chris Down 56k7132168 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Still, a lot of processes write to that instead of fd/2, which you could also redirect.

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

cron share|improve this question edited Oct 21 '14 at 13:31 Stéphane Chazelas 179k28289517 asked Oct 21 '14 at 12:59 Aw Qirui Guo 99861625 marked as duplicate by derobert, Braiam, slm♦ Oct It's free: ©2000-2016 nixCraft. Join Date Aug 2008 Beans 47 Re: Redirecting stderr to dev null ?? Redirect Stderr To Null Windows Problem is users get confused by the "permission denied" msgs output by the "rm".

Reference I/O Redirection share|improve this answer answered Oct 21 '14 at 13:13 geedoubleya 2,103718 add a comment| up vote 2 down vote Normally when cron executes a cronjob it sends the Portability to non-bash, tcsh, mksh, etc. It redirects file descriptor 2 (STDERR) and descriptor 1 (STDOUT) to /dev/null. >/dev/null This is just an abbreviation for 1>/dev/null. have a peek here Code: du -h -c ~ | grep total 2>/dev/null Can anyone help Thanks Adv Reply November 18th, 2009 #2 sisco311 View Profile View Forum Posts Private Message resistance is futile

The OP doesn't said nothing about this... In other words, the script is silenced. Standard in, out, and error There are three standard sources of input and output for a program. Interaction with dummy variable Computing only one byte of a cryptographically secure hash function If the square root of two is irrational, why can it be created by dividing two numbers?

I mean: I want to launch a command: - if all goes good --> no output - if something goes wrong --> output of errors Thanks, Ciccio Reply Link SilversleevesX October Cannot patch Sitecore initialize pipeline (Sitecore 8.1 Update 3) How could a language that uses a single word extremely often sustain itself? up vote 54 down vote favorite 34 I want one or two line description about the following command line: grep -i 'abc' content 2>/dev/null command-line grep stdout share|improve this question edited Reply Link Security: Are you a robot or human?

User contributions on this site are licensed under the Creative Commons Attribution Share Alike 4.0 International License. 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 | How to explain the use of high-tech bows instead of guns more hot questions question feed about us tour help blog chat data legal privacy policy work here advertising info mobile Unix and Linux: Redirect Error Output To null Command by Vivek Gite on June 5, 2013 last updated June 5, 2014 in BASH Shell, KSH Shell, Linux, UNIX I‘m a new

Re: Redirecting stderr to dev null ??