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Batch File Redirect Error To Null


The general idea was this: CTTY NUL ECHO Echo whatever you want, it won't be displayed on screen no matter what. You can redirect stderr by using the file number 2 in front of the operator: DIR SomeFile.txt 2>> error.txt You can even combine the stdout and stderr streams using the file shell io-redirection file-descriptors csh portability share|improve this question edited May 21 '14 at 8:40 Gilles 369k666681119 asked Apr 3 '13 at 1:25 Det 478156 1 Note that, while mksh supports In Windows XP the result is no text on screen and file.txt containing the line Helloworld2, including the trailing "2" (CMD.EXE interprets it as ECHOHelloworld2>file.txt). http://sovidi.com/batch-file/batch-file-pipe-error-to-null.php

share|improve this answer edited Sep 26 '13 at 13:55 answered Sep 26 '13 at 8:38 Warren Hill 10.2k104463 add a comment| up vote 10 down vote In short, it redirects stderr What have folks' experiences been with the different commands and bash/sh versions when trying it this way?I know it's not recommended, but for someone like myself, with scripts they either run Reply Link Martin June 2, 2014, 4:23 amYou could use find instead to filter out the files you don't want to delete, or only delete files matching a patter:Delete all files Why did companions have such high social standing?

Cmd Output To Null

Ask Ubuntu works best with JavaScript enabled current community chat Unix & Linux Unix & Linux Meta your communities Sign up or log in to customize your list. 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 This is a fine demonstration of only Standard Output being redirected to the NUL device, but Standard Error still being displayed. Contact Failed Mail Donate Batch How To ...

What could cause the throttle to stick in my Ford Ranger? asked 6 years ago viewed 13269 times active 2 months ago Related 282Useful Command-line Commands on Windows0How to customize Pipes in Windows?1Windows XP, pipe StdOut to Commandline1stdout, stderr, and what else? I am still trying to find a way to suppress that. –Mawg Mar 4 at 11:05 @Mawg I don't think it does. Batch File Redirect Output Append Modern soldiers carry axes instead of combat knives.

This will redirect the file descriptor, "M", to /dev/null. 2>&1 The general form of this one is M>&N, where "M" & "N" are file descriptor numbers. Batch File Redirect Stderr Adopt A Jet/Book Is the empty set homeomorphic to itself? Not the answer you're looking for? use: command 2>&1 1>/dev/null Reply Link nixCraft October 6, 2011, 12:54 amNo, it does not matters.

However, this will not work when command will use the standard error (FD # 2). Batch File Redirect Output To Console And File Can filling up a 75 gallon water heater tank without opening a faucet cause damage? ECHO By the way, did I warn you that the keyboard doesn't work either? Reply Link Shyam November 18, 2015, 4:10 pmHi, Please tell me how to redirect the output from a script to a log file so that i can save all the details

Batch File Redirect Stderr

Unfortunately, it can be done only in the old MS-DOS versions that came with a CTTY command. asked 3 years ago viewed 122267 times active 1 year ago Linked 3 Get current ssh session's originating IP without being superuser Related 27What does outputting to /dev/null accomplish in bash Cmd Output To Null For example, you can write a listing of the current directory to a text file: DIR > temp.txt The > operator will overwrite the contents of temp.txt with stdout from the Batch File Redirect Stderr And Stdout SomeCommand.exe > temp.txt OtherCommand.exe >> temp.txt By default, the > and >> operators redirect stdout.

Is the empty set homeomorphic to itself? weblink However, I am pretty sure it is just my faulty memory because I was on Windows at the time. –Alec Gorge Aug 18 '10 at 3:15 add a comment| 2 Answers What 2>&1 does, is merge Standard Error into the Standard Output stream, so Standard output and Standard Error will continue as a single stream. I'm sure you have something in mind where both good and bad output would normally go to stdout.BZT Reply Link josch October 5, 2011, 11:16 pmciccio, the order of the redirection Windows Batch File Redirect Stderr

Browse other questions tagged command-line grep stdout or ask your own question. Functions 2>&- The general form of this one is M>&-, where "M" is a file descriptor number. share|improve this answer edited Apr 3 '13 at 8:44 lesmana 8,89053856 answered Apr 3 '13 at 2:25 BriGuy 1,6981615 3 |& and &>/dev/null are not portable. –Chris Down Apr 3 http://sovidi.com/batch-file/batch-file-redirect-error.php Redirect to NUL (hide errors) command 2> nul Redirect error messages to NUL command >nul 2>&1 Redirect error and output to NUL command >filename 2> nul Redirect output to file but

Guides Guide to Windows Batch Scripting Recent Posts Parsing Jenkins secrets in a shell script Jenkins Job to export Rackspace Cloud DNS Domain As BIND Zone Files Troubleshooting GitHub WebHooks SSL Batch File Redirect Output To File And Screen Browse other questions tagged windows windows-7 windows-command-prompt stdout or ask your own question. But the next one is new: test.bat > NUL 2>&1 and you should see: C:\>test.bat This text goes to the Console C:\>_ This time we redirected both Standard Output and Standard

The batch file would look like this: command > logfile and the command line would be: START batchfile Some "best practices" when using redirection in batch files: Use >filename.txt 2>&1 to

DIR>filename.txt and DIR>filename.txt are identical, ECHOHelloworld>filename.txt and ECHOHelloworld>filename.txt are not, even though they are both valid. It's ok to use spaces in redirection commands. Is the following extension of finite state automata studied? Batch File Redirect Output To Text File Duly edited my answer. –AirCombat Jul 29 '15 at 18:54 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign up

In a GNU C macro envSet(name), what does (void) "" name mean? Didn't know that one. 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 pmTry:(ps -ef | grep | grep http://sovidi.com/batch-file/batch-file-redirect-std-error.php Starting a new CMD shell also has a small (likely unnoticable) effect on performance.

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Case in point: @for /L %C in (1,1,10) do @type nonexistent 2> nul does not produce ten blank lines. –atzz Mar 4 at 12:10 1 @PatrickFromberg That's because con is Copy the following code into Notepad and save it as "test.bat": @ECHO OFF ECHO This text goes to Standard Output ECHO This text goes to Standard Error 1>&2 ECHO This text For example: SET /P _cost="Enter the price: " & ECHO %_cost% This behaviour can be changed using SETLOCAL EnableDelayedExpansion Creating a new file Create empty files using the NUL device: Type It combines the output of file descriptors "M" and "N" into a single stream. |& This is just an abbreviation for 2>&1 |.

Reply Link Frank June 30, 2009, 5:15 pmneed a command in my bash script to remove some (not all) of the contents of directory2. Skipping directly to level 4 What is the sh -c command? You may say 'It worked!', if you want. 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.

Display text To display a text on screen we have the ECHO command: ECHO Hello world This will show the following text on screen: Hello world When I say "on screen", I can assure you I did try! How to map and sum a list fast? ECHO The only way to get control over the computer again is a cold reboot, ECHO or the following command: CTTY CON A pause or prompt for input before the CTTYCON