[CentOS] Pipe into logger duplicates messages in /var/log/messages

Alexander thahartner at gmail.com
Tue Mar 4 08:30:44 UTC 2014


Yes, I meant to use the pipe symbol.

-bash-4.1# echo "hi" | logger -t test
-bash-4.1# tail messages
Mar  4 08:28:36 localhost kernel: imklog 5.8.10, log source = /proc/kmsg 
started.
Mar  4 08:28:36 localhost rsyslogd: [origin software="rsyslogd" 
swVersion="5.8.10" x-pid="14128" x-info="http://www.rsyslog.com"] start
Mar  4 08:28:52 localhost test: hi
Mar  4 08:28:52 localhost test: hi

As you can see all messages are duplicated. I tried this on a clean 
install of CentOS but was not able to reproduce this problem. Any 
pointers which might help me debug this issue.



On 04/03/14 13:58, David Benfell wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
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>
> On 03/03/2014 09:34 PM, Alexander wrote:
>> I am trying to pipe the output from a process into syslog using the
>> logger command. Initially I pipe the output into a separate file,
>> but as it happens this filled up the disk when things went wrong.
>> So I figured I redirect the output to syslog and let logrotate deal
>> with the roll-over and archive of the file.
>>
>> However the following command :
>>
>> echo "HI" > logger -t test
> What are the contents of the file HI in the working directory from
> which you ran this command?
>
> (I think you mean `echo "HI" | logger -t test`.)
>
>
> - -- 
> David Benfell
> see https://parts-unknown.org/node/2 if you don't understand the
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