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One of the ways to get the effect you want, you would run your script and direct stderr to somewhere else at the same time, so, ./myscript 2>> errors.txt at that What i've tried: if ls ./python* 2> /dev/null; then echo found Python fi Which works, if Python is not present it will mute the error messages from ls. How could a language that uses a single word extremely often sustain itself? You can redirect the file descriptors of the shell permanently (or at least until the next time you change them) by using a redirection on the exec builtin with no command http://supercgis.com/stderr-to/redirect-standard-error-and-out-to-file.html

Thankyou! normal redirection is not working1Can't redirect standard output0How to redirect all manuals to files?1printf, redirection, crontab0What goes on underneath error redirection?-1how to use output redirection to demonstrate what TREE does1Redirecting apt-get There's no more Bourne shell nowadays. Should be: yourcommand &>filename (redirects both stdout and stderr to filename). http://askubuntu.com/questions/625224/how-to-redirect-stderr-to-a-file

Redirect Stdout And Stderr To Dev Null

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asked 4 years ago viewed 17973 times active 5 months ago Blog Stack Overflow Podcast #92 - The Guerilla Guide to Interviewing Linked 0 redirect all errors of my script into Changing to >&3 may help. –quizac Sep 23 '14 at 17:40 add a comment| up vote 1 down vote For tcsh, I have to use the following command : command >& I am aware of <() and $() process and command substitution respectively but not of {}. –ronnie Oct 20 '12 at 6:54 add a comment| Your Answer draft saved draft Redirect Stdout To File C bash chose &> (now also supported by zsh and some pdksh derivatives) though it clearly breaks POSIX compliance since foo &> file is perfectly valid POSIX syntax which means something completely

Browse other questions tagged bash shell redirect pipe or ask your own question. Redirect Stdout And Stderr To File Windows Reply Link xuhui November 24, 2014, 1:19 pm Useful for me!!!! Not the answer you're looking for? his explanation 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

But the last two commands are equivalent, they will send both error and output to the same file. –terdon♦ May 18 '15 at 13:17 As in the link you Tcsh Redirect Stderr The man page does specify a preference for '&>' over '>&', which is otherwise equivalent. –chepner Jul 16 '12 at 20:45 6 I guess we should not use &> as exec 3>&1 4>&2 1> >(tee >(logger -i -t 'my_script_tag') >&3) 2> >(tee >(logger -i -t 'my_script_tag') >&4) trap 'cleanup' INT QUIT TERM EXIT get_pids_of_ppid() { local ppid="$1" RETVAL='' local pids=`ps x Reply Link RudyD April 2, 2012, 12:47 pm Greetings!

Redirect Stdout And Stderr To File Windows

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 http://askubuntu.com/questions/625224/how-to-redirect-stderr-to-a-file How is this red/blue effect created? Redirect Stdout And Stderr To Dev Null more hot questions question feed lang-sh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Redirect Stderr To Dev Null The numbers refer to the file descriptor numbers (0 standard input, 1 standard output, 2 standard error).

The Rule of Thumb for Title Capitalization Draw an hourglass What to do with my pre-teen daughter who has been out of control since a severe accident? Check This Out To the author of the original post, It depends what you need to achieve. Why did the distance requirement for my buddy change? Create FDs #3 and #4 and point to the same "location" as #1 and #2 respectively. Bash Redirect Stderr To Dev Null

Does dropping a Coursera course look bad in a PhD application to the university offering the course? Now, FDs #3 and #4 point to STDOUT and STDERR respectively. exec 1<>$LOG_FILE # Redirect STDERR to STDOUT exec 2>&1 echo "This line will appear in $LOG_FILE, not 'on screen'" Now, simple echo will write to $LOG_FILE. Source Problem of display in tikz Interaction with dummy variable Are there other Pokemon with higher spawn rates right now?

What is {} called in bash. Bash Pipe Stderr SSH makes all typed passwords visible when command is provided as an argument to the SSH command If the square root of two is irrational, why can it be created by Why is international first class much more expensive than international economy class?

Faria 4061718 add a comment| 1 Answer 1 active oldest votes up vote 16 down vote accepted There are two main output streams in Linux (and other OSs), standard output (stdout)and

Does bitcoin have the potential to be subject to a hard fork where miners are forced to choose which fork they will accept, like Etherum? share|improve this answer answered May 18 '15 at 12:50 terdon♦ 42.5k686154 So 'hashdeep -rXvvl -j 30 -k checksums.txt /mnt/app/ >> result_hashdeep.txt 2> error_hashdeep.txt &' or 'hashdeep -rXvvl -j 30 To avoid seeing the error message, put the whole command inside a group and redirect the error stream from the whole group: { date= $(date); } 2>/dev/null With braces, the command Ambiguous Output Redirect If you write date= $(date) 2>/dev/null, the “command not found” message comes from the shell, not from the command whose error stream is redirected.

Browse other questions tagged command-line redirect or ask your own question. Put '2>&1' after '>file.log' and it works. –user25148 Mar 12 '09 at 9:25 1 Good point, I seem to have been doing this wrong all these years... up vote 265 down vote do_something 2>&1 | tee -a some_file This is going to redirect stderr to stdout and stdout to some_file and print it to stdout. have a peek here How does the exit command work on a Unix terminal?

shell io-redirection openbsd share|improve this question asked Jun 25 '13 at 19:12 Torxed 73031029 add a comment| 1 Answer 1 active oldest votes up vote 37 down vote accepted I believe I'm very lost with this. Just something to keep in mind. Bash and other modern shell provides I/O redirection facility.

Browse other questions tagged bash stdout stderr or ask your own question. Computing only one byte of a cryptographically secure hash function Accidentally modified .bashrc and now I cant login despite entering password correctly (Seemingly) simple trigonometry problem What is the meaning of Is it safe for a CR2032 coin cell to be in an oven? no, do not subscribe yes, replies to my comment yes, all comments/replies instantly hourly digest daily digest weekly digest Or, you can subscribe without commenting.

Does bitcoin have the potential to be subject to a hard fork where miners are forced to choose which fork they will accept, like Etherum? share|improve this answer answered May 18 '15 at 12:50 terdon♦ 42.5k686154 So 'hashdeep -rXvvl -j 30 -k checksums.txt /mnt/app/ >> result_hashdeep.txt 2> error_hashdeep.txt &' or 'hashdeep -rXvvl -j 30 If you just need to redirect in/out of a command you call from your script, the answers are already given. I made the fix and added the post to community wiki –f3lix Mar 12 '09 at 9:49 4 If you want to append to a file then you must do

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? Do I need to turn off camera before switching auto-focus on/off? How come Ferengi starships work? Faria May 18 '15 at 13:38 @terdon how do I redirect output to a file which has no "w" permission for others , I meant to ask can I

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 At that stage, you're not redirecting stderr anywhere. more hot questions question feed lang-bsh about us tour help blog chat data legal privacy policy work here advertising info mobile contact us feedback Technology Life / Arts Culture / Recreation Does WiFi traffic from one client to another travel via the access point?

They're just syntactic sugar, just use > file 2>&1 which is standard and portable (to Bourne-like shells). –Stéphane Chazelas Dec 9 '14 at 14:26 | show 2 more comments Your Answer