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Bash Redirect Error To Log File


For the ampersand issue I have no solution, sorry. 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. The command reads left to right, so the first thing it sees in yours is 2>&1 which moves stderr to the address 1001, it then sees > file which moves stdout Put '2>&1' after '>file.log' and it works. –Lars Wirzenius Mar 12 '09 at 9:25 1 Good point, I seem to have been doing this wrong all these years... this contact form

The most prevalent implementation is Vixie cron. good explanation, I'd like to make a function on C that redirects STDIN and SDTOUT to an script, how can I do that, I mean, the exist a library's on C exec 3>&- #we don't need 3 any more I've seen some people using this as a way to discard, say stderr, using something like: command 2>&-. For instance, if you open a file descriptor with exec 3>file, all the commands afterwards will inherit it.

Bash Redirect Error Output To File

You could then talk about the jobs using a % followed by the number like kill %1 or so. At that stage, you're not redirecting stderr anywhere. Did Donald Trump call Alicia Machado "Miss Piggy" and "Miss Housekeeping"? Why write an entire bash script in functions?

  1. but not for every stiuation.
  2. When taking passengers, what should I do to prepare them?
  3. Thanks! –Guðmundur H Mar 12 '09 at 9:34 I tend to forget that...

exec 3>&1 # Save current "value" of stdout. I/O RedirectionTable of Contents20.1. How to deal with a really persuasive character? Bash Redirect Stderr And Stdout To File And Screen Are there any 'smart' ejection seats?

It seems that /dev/stderr can have problem in cron. Bash Redirect Stderr To File Train ride from Copenhagen to Malmo Why don't most major game engines use gifs for animated textures? Notice that you should be pretty sure of what a command is doing if you are going to wipe it's output. It's free: ©2000-2016 nixCraft.

Join them; it only takes a minute: Sign up How to redirect both stdout and stderr to a file up vote 158 down vote favorite 44 Hi I am running a Bash Redirect Error To Variable UNIX is a registered trademark of The Open Group. Cool. Is the "1" a file descriptor or an argument to cmd? (answer: it's the FD).

Bash Redirect Stderr To File

Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the Later we will see how this can be useful. Bash Redirect Error Output To File So it may depend on the shell (or shell compatibility level) you use in cron. Bash Redirect Stderr To File Append There are 3 default standard files (standard streams) open: [a] stdin - Use to get input (keyboard) i.e.

In other words, can I do something like this? weblink Problem? M2 Change the default shell by adding SHELL=/bin/bash in the crontab -e file. 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 Bash Redirect Stderr And Stdout To File

UNIX is a registered trademark of The Open Group. How to indicate you are going straight? Good way to explain fundamental theorem of arithmetic? navigate here The second is less efficient but behaves in ways that are useful in certain circumstances. (Read about "subshells" to learn more.) –dubiousjim Oct 19 '12 at 14:20 add a comment| up

Force Microsoft Word to NEVER auto-capitalize the name of my company Natural construction Yes, of course I'm an adult! Bash Redirect Error Output To /dev/null What does an 'ü' mean? 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

Any suggestions?

So you stil get to see everything! I'm very lost with this. bash io-redirection cron share|improve this question asked Oct 19 '12 at 15:16 RanRag 95031115 add a comment| 1 Answer 1 active oldest votes up vote 46 down vote accepted I solved Redirect Script Output To File Thanks a lot.

it's the top level script output you need to redirect. 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 Can anybody explain what exactly happens? http://waspsoft.com/bash-redirect/bash-redirect-output-and-error-to-file.html More On File Descriptors Duplicating File Descriptor 2>&1 We have seen how to open (or redirect) file descriptors.

You will also notice that even in this scenario, terminal 1 does not see the PS3 prompt since it does not return a newline. valuable info. –RanRag Oct 19 '12 at 16:09 How to insert YYYY-MM-DD_hh-mm-sec into output file name, so that every file name is different and kept without rewriting? –Danijel Jan no, do not subscribeyes, replies to my commentyes, all comments/replies instantlyhourly digestdaily digestweekly digest Or, you can subscribe without commenting. Reply Link xuhui November 24, 2014, 1:19 pmUseful for me!!!!

I think it would be a little bit clearer if you would put a label on each of your illustrations and make more explicit the transition from one illustration to another. How to increase the population growth of the human race Activate Hearthstone season chest cards? Is it possible to get Bash to do this? Always place redirections together at the very end of a command after all arguments.

Here is something that does work. Reply Link Shane Hathaway February 24, 2012, 1:02 amSayed: that line means execute the command while redirecting both stdout and stderr to a file given by file-name. Never use the Csh &>foo and >&foo shorthand redirects. Browse other questions tagged bash io-redirection cron or ask your own question.

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 Outside the whole construct you collect your original standard output (descriptor 3) and your original standard error output (descriptor 1 - through tee) to the normal descriptors (1 and 2), the M>N # "M" is a file descriptor, which defaults to 1, if not explicitly set. # "N" is a filename. # File descriptor "M" is redirect to file "N." M>&N # What will command 3> file do?