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25.8. Debugging Rsyslog
To run
rsyslogd
in debugging mode, use the following command:
rsyslogd
-dn
With this command,
rsyslogd
produces debugging information and prints it to the standard output. The -n
stands for "no fork". You can modify debugging with environmental variables, for example, you can store the debug output in a log file. Before starting rsyslogd
, type the following on the command line:
export RSYSLOG_DEBUGLOG="path" export RSYSLOG_DEBUG="Debug"
Replace path with a desired location for the file where the debugging information will be logged. For a complete list of options available for the RSYSLOG_DEBUG variable, see the related section in the
rsyslogd(8)
manual page.
To check if syntax used in the
/etc/rsyslog.conf
file is valid use:
rsyslogd
-N
1
Where
1
represents level of verbosity of the output message. This is a forward compatibility option because currently, only one level is provided. However, you must add this argument to run the validation.