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BUNYAN(1)			 bunyan manual			     BUNYAN(1)

       bunyan - filter and pretty-print Bunyan log file content

       bunyan [OPTIONS]

       ... | bunyan [OPTIONS]

       bunyan [OPTIONS] -p PID

       "Bunyan"	 is  a simple and fast a JSON logging library for node.js ser‐
       vices, a one-JSON-object-per-line log format, and a bunyan CLI tool for
       nicely viewing those logs. This man page describes the latter.

       A  bunyan log file is a stream of JSON objects, optionally interspersed
       with non-JSON log lines. The primary usage of bunyan(1)	is  to	pretty
       print, for example:

	   $ bunyan foo.log	     # or `cat foo.log | bunyan
	   [2012-02-08T22:56:52.856Z]  INFO: myservice/123 on example.com: My message
	       extra: multi
	   [2012-02-08T22:56:54.856Z] ERROR: myservice/123 on example.com: My message

       By  default  the "long" output format is used. Use the -o FORMAT option
       to emit other formats. E.g.:

	   $ bunyan foo.log -o short
	   22:56:52.856Z  INFO myservice: My message
	       extra: multi
	   22:56:54.856Z ERROR myservice: My message

       These will color the output if supported in your terminal. See  "OUTPUT
       FORMATS" below.

       The bunyan CLI can also be used to filter a bunyan log. Use -l LEVEL to
       filter by level:

	   $ bunyan foo.log -l error	   # show only ´error´ level records
	   [2012-02-08T22:56:54.856Z] ERROR: myservice/123 on example.com: My message

       Use -c COND to filter on a JavaScript expression returning true on  the
       record data. In the COND code, this refers to the record object:

	   $ bunyan foo.log -c `this.three`	# show records with the ´extra´ field
	   [2012-02-08T22:56:52.856Z]  INFO: myservice/123 on example.com: My message
	       extra: multi

       -h, --help
	      Print this help info and exit.

	      Print version of this command and exit.

       -q, --quiet
	      Don´t warn if input isn´t valid JSON.

       Dtrace options (only on dtrace-supporting platforms):

       -p PID, -p NAME
	      Process bunyan:log-* probes from the process with the given PID.
	      Can be used multiple times, or specify all processes  with  ´*´,
	      or  a set of processes whose command & args match a pattern with
	      ´-p NAME´.

       Filtering options:

       -l, --level LEVEL
	      Only show messages at or above  the  specified  level.  You  can
	      specify level names or numeric values. (See ´Log Levels´ below.)

       -c COND, --condition COND
	      Run  each	 log message through the condition and only show those
	      that resolve to a truish value. E.g. -c ´this.pid == 123´.

	      Suppress all  but	 legal	Bunyan	JSON  log  lines.  By  default
	      non-JSON, and non-Bunyan lines are passed through.

       Output options:

	      Colorize output. Defaults to try if output stream is a TTY.

	      Force no coloring (e.g. terminal doesn´t support it)

       -o FORMAT, --output FORMAT
	      Specify  an  output  format.  One	 of paul (the default), short,
	      json, json-N, or inspect.

       -j     Shortcut for -o json.

       In Bunyan log records, then level field is a number. For the -l|--level
       argument	 the level names are supported as shortcuts. In -c|--condition
       scripts, uppercase symbols like "DEBUG" are defined for convenience.

	   Level Name	   Level Number	   Symbol in COND Scripts
	   trace	   10		   TRACE
	   debug	   20		   DEBUG
	   info		   30		   INFO
	   warn		   40		   WARN
	   error	   50		   ERROR
	   fatal	   60		   FATAL

       paul (default)	   The default output. Long form. Colored and "pretty".
			   ´req´ and ´res´ and ´err´ fields are rendered specially
			   as an HTTP request, HTTP response and exception
			   stack trace, respectively. Note: the "paul" name
			   is deprecated and will be changed to "long".
       short		   Like the default output, but more concise. Some
			   typically redundant fields are ellided.
       json		   JSON output, 2-space indentation.
       json-N		   JSON output, N-space indentation, e.g. "json-0"
       inspect		   Node.js `util.inspect` output.

       On systems that support DTrace (e.g., MacOS, FreeBSD,  illumos  deriva‐
       tives  like  SmartOS  and OmniOS), Bunyan will create a DTrace provider
       (bunyan) that makes available the following probes:


       Each of these probes has a single argument: the string  that  would  be
       written	to  the	 log.  Note that when a probe is enabled, it will fire
       whenever the corresponding function is called, even if the level of the
       log message is less than that of any stream.

       See   https://github.com/trentm/node-bunyan#dtrace-support   for	  more
       details and the ´-p PID´ option above for convenience usage.

	      Set to a non-empty  value	 to  force  no	output	coloring.  See

       bunyan  is  written  in	JavaScript  and	 requires  node.js (node). The
       project lives at https://github.com/trentm/node-bunyan and is published
       to npm as "bunyan".

       ·   README, Install notes: https://github.com/trentm/node-bunyan#readme

       ·   Report bugs to https://github.com/trentm/node-bunyan/issues.

       ·   See	the  full  changelog  at:  https://github.com/trentm/node-bun‐

       MIT   License   (see    https://github.com/trentm/node-bunyan/blob/mas‐

       node-bunyan is Copyright (c) 2012 Joyent, Inc. Copyright (c) 2012 Trent
       Mick. All rights reserved.

				 November 2012			     BUNYAN(1)

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