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How to redirect standard output to multiple log files Following seems to be not working. Any help is appreciated.

some_command 1> output_log_1 output_log_2 2>&1

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With zsh, you can use some_command >output_log_1 >output_log_2. –  jofel Jun 21 '12 at 8:36

2 Answers 2

Something like that

echo test | tee file1 file2 file3
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can the stderr be also redirected in more than one file? –  fromnaboo Jun 23 '12 at 9:07
Yes, it can be done by virtue of redirection: find / -name test 2>&1 | tee file1 file2 file3 –  akond Jun 23 '12 at 18:27
thank you akond. –  fromnaboo Jun 23 '12 at 18:37
@akond, cmd 2>&1 | tee log1 log2 I tried executing like above, but i need to press ctrl-c to redirect it to second log file. also the output is printed on the console. I want command output to be redirected to logs but not on the console. any help is appreciated. –  doubledecker Jun 25 '12 at 10:34
@doubledecker The tee command writes stdin to file(s) and also to stdout. If you don't want the output to appear on the terminal, you have to redirect to /dev/null like you normally would. –  Minix Dec 16 '14 at 8:28

Let's say your output is generated from a function, cmd() :

cmd() {
    echo hello world!

To redirect the output from cmd to two files, but not to the console, you can use:

cmd | tee file1 file2 >/dev/null

This will work for multiple files, given any data source piping to tee:

echo "foobarbaz" | tee file1 file2 file3 file4 > /dev/null

This will also work:

echo $(cmd) | tee file1 file2 >/dev/null

Without the /dev/null redirection, tee will send output to stdout in addition to the files specified.

For example, if this is run from the console, you'll see the output there. Run from a crontab, the output will appear the status message which is mailed to you (also see Gilles' answer here http://unix.stackexchange.com/a/100833/3998).

This worked for me in bash on Ubuntu 12.04, and has been verified in Ubuntu 14.04 using GNU bash 4.3.11(1), so it should work on any recent GNU bash version.

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@doubledecker -- this looks like it satisfies your conditions, so can be accepted as the answer. Also, +1 as I've tested this under GNU bash (version 4.3.11(1)-release (i686-pc-linux-gnu)) in Ubuntu 14.04. –  belacqua Jun 20 '14 at 19:47

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