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Redirect Standard Error To Standard Out Bash


Are there any ways to speed up blender compositor? Note: The order matters as liw.fi pointed out, 2>&1 1>file.log doesn't work. There's also a decent chance that the command will return an error status since there is diagnostic output, so the && will then not help. This means that in your command standard output is first replaced with /dev/null, and then standard error replaced with standard output, which is /dev/null already. Source

asked 7 years ago viewed 29178 times active 4 years ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Get the weekly newsletter! Now, FDs #3 and #4 point to STDOUT and STDERR respectively. Note that this is an extension supported by some shells (including bash), but apparently not standard in sh. –Tom Alsberg Feb 14 '09 at 21:21 Closing stdout, rather than Any idea why? –Alexandre Holden Daly May 30 '14 at 12:12 1 Note that (by default) this has the side-effect that $? http://www.tldp.org/LDP/abs/html/io-redirection.html

Bash Redirect Stdout And Stderr To Dev Null

Bitwise rotate right of 4-bit value Does the local network need to be hacked first for IoT devices to be accesible? If you close stdout first, there is no way to redirect stderr to it. –Tom Alsberg Feb 14 '09 at 20:48 Okay, based on this, I found that this I think the only way to write to the same file is as has been given before cmd >log.out 2>&1.

It almost work, but not from xinted ;( share|improve this answer answered Apr 23 '09 at 13:14 log-control I'm guessing it doesn't work because of "/dev/fd/3 Permission denied". There are two incorrect concepts in your answer. Maybe you can update the answer because as it's currently written one might try this: >&- 2>&1, which does not work. –Frank Feb 14 '09 at 21:06 Yes, that Tcsh Redirect Stderr echo 1234567890 > File # Write string to "File".

Reply Link TodorMinchev May 14, 2013, 9:03 pm RudyD +1 :) Reply Link Daniel August 26, 2013, 7:22 pm Actually it means "first redirect STDERR to STDOUT, so any errors printed Bash Redirect Stderr To Dev Null OR read more like this:How do I save or redirect stdout and stderr into different files?Linux Redirect Error Output To FileBASH Shell Redirect Output and Errors To /dev/nullUnix and Linux: Redirect Not the answer you're looking for? recommended you read I prefer separate files which require less parsing but as I said, whatever makes your boat floating :) –quizac Dec 8 '14 at 11:02 how do you switch back

bash redirect stdout share|improve this question asked Feb 14 '09 at 20:27 Frank 22.7k64178281 marked as duplicate by tripleeebash Users with the bash badge can single-handedly close bash questions as duplicates Bash Script Output To File This is why pipes work. Additionally it will not append to the file but it will overwrite it. –pabouk May 31 '14 at 12:38 Correct: File descriptor could be any values which is more If those answers do not fully address your question, please ask a new question.

Bash Redirect Stderr To Dev Null

asked 7 years ago viewed 339667 times active 4 months ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 56 Piping both stdout and stderr in bash? have a peek at this web-site Then you will have standard error go to standard output, and the original standard output go to /dev/null: cmd 2>&1 >/dev/null | grep pattern (note that the 1 before > is Bash Redirect Stdout And Stderr To Dev Null ERRORFILE=script.errors bad_command1 2>$ERRORFILE # Error message sent to $ERRORFILE. Ambiguous Output Redirect Not the answer you're looking for?

Manually modify lists for survival analysis Problems with amsmath How to explain the concept of test automation to a team that only knows manual testing? this contact form How to explain centuries of cultural/intellectual stagnation? Your version redirects err to out, and at the same time out to file. –Alex Yaroshevich Mar 8 '15 at 23:22 | show 1 more comment Your Answer draft saved Alphabet Diamond What are the differences between update and zip packages Why did the distance requirement for my buddy change? Bash Echo To Stderr

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 echo 1234567890 > File # Write string to "File". What happens if the same field name is used in two separate inherited data templates? have a peek here Changing STDOUT after STDERR had been redirected to STDOUT won't change STDERR.

The accepted answer do_something &>filename doesn't. +1. –Withheld Jan 4 '13 at 16:01 4 @Daniel, but this question is specifically about bash –John La Rooy Aug 19 '13 at 3:38 Redirect Stdout And Stderr To File Windows Bitwise rotate right of 4-bit value Cannot patch Sitecore initialize pipeline (Sitecore 8.1 Update 3) Is cardinality a well defined function? You expected the last quoted redirection to be applied to the ones before it on every output, so that output the original standard output file descriptor (1) will go to /dev/null,

exec 3>&- # Close fd 3.

Accepted answer resolved this the right way. –AoeAoe Sep 6 '12 at 15:39 1 @AoeAoe: This actually works in Bash 4 too. –mk12 Sep 6 '12 at 21:11 1 SSH makes all typed passwords visible when command is provided as an argument to the SSH command more hot questions lang-sh about us tour help blog chat data legal privacy policy And this one doesn't work since grep doesn't read the STDERR output: cmd 1>/dev/null | grep pattern But also, this one won't work: cmd 1>/dev/null 2>&1 | grep pattern because the Redirect All Output To File DDoS: Why not block originating IP addresses?

Alphabet Diamond Save a JPG without a background How to slow down sessions? Why do composite foreign keys need a separate unique constraint? (Seemingly) simple trigonometry problem How to search for flights for a route staying within in an alliance? Browse other questions tagged shell io-redirection openbsd or ask your own question. http://supercgis.com/stderr-to/redirect-standard-error-bash-script.html for real loggin better way is: exec 1>>$LOG_FILE it cause log is allways appended. –Znik Dec 8 '14 at 9:43 2 That's true although it depends on intentions.

share|improve this answer edited Mar 12 '09 at 9:33 answered Mar 12 '09 at 9:17 Guðmundur H 4,88121519 add a comment| up vote 19 down vote Curiously, this works: yourcommand &> command1 | command2 | command3 > output-file See Example 16-31 and Example A-14.

Multiple output streams may be redirected to one file. I suggest removing this. –Jonathan Leffler Feb 14 '09 at 21:36 Also consider that the output may be very large, and with cat you will see the grep only Join them; it only takes a minute: Sign up How can I redirect STDERR to STDOUT, but ignore the original STDOUT? [duplicate] up vote 48 down vote favorite 17 This question

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 Should non-native speakers get extra time to compose exam answers? Is the ability to finish a wizard early a good idea? ls -yz 2>&1 >> command.log # Outputs an error message, but does not write to file. # More precisely, the command output (in this case, null) #+ writes to the file,

You can also use 1 instead of 2 so that stdout gets redirected to the 'file' share|improve this answer answered Sep 24 '11 at 5:53 PaulDaviesC 512922 add a comment| Your Does dropping a Coursera course look bad in a PhD application to the university offering the course? Not the answer you're looking for? Join them; it only takes a minute: Sign up Redirect stderr and stdout in a Bash script up vote 369 down vote favorite 118 I want to redirect both stdout and

Anti-static wrist strap around your wrist or around your ankle? Privacy - Terms of Service - Questions or Comments current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Useful for daemonizing. bash stdout stderr share|improve this question edited Sep 23 '11 at 10:11 asked Sep 23 '11 at 9:35 sdmythos_gr 1,67121321 2 possible duplicate of Redirect stderr and stdout in a

To the author of the original post, It depends what you need to achieve.