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Bash Redirect Standard Error To Stdout


I was looking for it around here and didn't find it. no longer refers to the exit status of do_something, but the exit status of tee. –Flimm Jan 20 '15 at 14:09 | show 3 more comments up vote 124 down vote Can I log both the stderr and stdout logged to a file? Do COB LEDs usually need electrically insulating from the heatsink? his comment is here

The way to go portable (similar to the appending answers) always was and still is >outfile 2>&1 –TheBonsai May 18 '09 at 4:48 add a comment| 6 Answers 6 active oldest How to book a flight if my passport doesn't state my gender? You must use a temporary file (or a named pipe) to achieve that one. –zb' Dec 10 '12 at 18:17 is there some specific reason why you don't want And yes, during my research I found some weirdness in the Bash manual page about it, I will ask on the mailing list.

Bash Redirect Stderr To Stdout To File

bad_command2 2>>$ERRORFILE # Error message appended to $ERRORFILE. E.g. What could cause the throttle to stick in my Ford Ranger?

Should be: yourcommand &>filename (redirects both stdout and stderr to filename). 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 This might be useful to have optical nice code also when using here-documents. Bash Redirect Stdout And Stderr To Different Files asked 3 years ago viewed 19353 times active 5 months ago Visit Chat Linked 25 Store / Capture stdout and stderr in different variables (bash) 1217 In the shell, what does

Are there any 'smart' ejection seats? Bash Redirect Stderr To Stdout To Dev Null I'll simplify it and hope I interpreted it right: cat <Table of Contents20.1.

All about redirection 3.1 Theory and quick reference There are 3 file descriptors, stdin, stdout and stderr (std=standard). Bash Redirect Stdout And Stderr To Same File If those answers do not fully address your question, please ask a new question. LOGFILE=script.log echo "This statement is sent to the log file, \"$LOGFILE\"." 1>$LOGFILE echo "This statement is appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This statement is also appended to \"$LOGFILE\"." 1>>$LOGFILE echo "This If you have to use operands (e.g.

Bash Redirect Stderr To Stdout To Dev Null

So stderr goes to the stdout and that goes to the file. cat *.txt | sort | uniq > result-file # Sorts the output of all the .txt files and deletes duplicate lines, # finally saves results to "result-file".

STDOUT to file (append mode) (short for 1>>file) 2>&1 : Red. this content Another cool solution is about redirecting to both std-err/out AND to logger or log file at once which involves splitting "a stream" into two. It's a mighty tool that, together with pipelines, makes the shell powerful. echo -n . >&3 # Write a decimal point there. Bash Redirect Stderr To Stdout Tee

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 It will make STDERR point to STDOUT and then change STDOUT to something else (without touching STDERR) Here is a more detailed tutorial covering both those misconceptions http://wiki.bash-hackers.org/howto/redirection_tutorial Reply Link iek A bit more background: I am running this a computer that has bash version 3.1.21. –John Mark Mitchell Apr 13 at 20:52 1 @JohnMarkMitchell You're using an antipattern here! weblink For example: banana() { printf 'banana to stdout %d\n' {1..10} echo >&2 'banana to stderr' return 42 } . <({ berr=$({ mapfile -t bout < <(banana); } 2>&1; declare -p bout

Modern soldiers carry axes instead of combat knives. Bash Redirect Stdout And Stderr Append To File echo -n . >&3 # Write a decimal point there. The TARGET is not truncated before writing starts.

Just something to keep in mind.

Then, execute ‘command' and redirect its STDOUT to ‘file-name'" - keeping in mind that at this point STDOUT will also contain whatever is written to STDERR because of the earlier redirection. example seemed to not work so I was trying to make the eval version work for my present needs. The TARGET is truncated before writing starts. Bash Redirect Stdout And Stderr To Variable result=$1 shift # Name of shell variable to capture the stderr of command.

It does appear to be working on my machine which runs Gnu bash v3.2.48. –James Wald Apr 10 '14 at 7:32 5 @CostiCiudatu the &>> operator does not seem to I'm editing my answer to remove the first example. –Aaron R. read -n 4 <&3 # Read only 4 characters. check over here Not the answer you're looking for?

If you want to redirect both, stderr and stdout to the same file (like /dev/null, to hide it), this is the wrong way: # { echo OUTPUT; echo ERRORS >&2; } Whereas, > will overwrite any existing data in the file. in the first example you wrote: exec 1<>$LOG_FILE . share|improve this answer edited Oct 7 '10 at 5:44 David Johnstone 14k115467 answered Mar 12 '09 at 9:17 dirkgently 74.1k1293162 6 Somebody should restore to the second edit of this

How to extrude a face parallel to another? 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 What is the sh -c command? cat File # ==> 1234.67890 # Random access, by golly. | # Pipe. # General purpose process and command chaining tool. # Similar to ">", but more general in effect.

Browse other questions tagged bash shell redirect pipe or ask your own question. These will be used as real terminal STDOUT and STDERR. 1> >(...) redirects STDOUT to command in parens parens(sub-shell) executes 'tee' reading from exec's STDOUT(pipe) and redirects to 'logger' command via asked 4 years ago viewed 48808 times active 2 years ago Linked 9 Logging stdout and stderr of node 6 Cause runtime exceptions to be properly ordered with println in console It is sometimes useful to assign one of these additional file descriptors to stdin, stdout, or stderr as a temporary duplicate link. [3] This simplifies restoration

Just for completion's sake, you can write 1> as just > since the default file descriptor is the output.