The Linux Manuals (man pages) document is an important part of Linux documents. Linux Manuals are organized as several sections. Each section has a group of commands for a specific area in Linux usage, administration or development.
rrdinfo – extract header information from an RRD Synopsisrrdtool info filename [–daemon address] DescriptionThe info function prints the header information from an RRD in a parsing friendly format. Check rrdcreate if you are uncertain about the meaning of the individual keys. filename The name of the RRD you want to examine. –daemon address Address of the…
rrdgraph_rpn – About RPN Math in rrdtool graph SynopsisRPN expression:=vname|operator|value[,RPN expression] DescriptionIf you have ever used a traditional HP calculator you already know RPN (Reverse Polish Notation). The idea behind RPN is that you have a stack and push your data onto this stack. Whenever you execute an operation, it takes as many elements from…
rrdgraph_libdbi – fetching data for graphing in rrdtool graph via libdbi Synopsis<rrdfile> = sql//<libdbi driver>/<driver-option-name>=<driver-option-value>/…[/rrdminstepsize=<stepsize>][/rrdfillmissing=<fill missing n seconds>]//<table>/<unixtimestamp column>/<data value column>[/derive]/<where clause 1>/…/<where clause n> DescriptionThis pseudo-rrd-filename defines a sql datasource: sql// magic cookie-prefix for a libdbi type datasource<libdbi driver> which libdbi driver to use (e.g: mysql)<driver-option-name>=<driver-option-value> defines the parameters that are required to connect…
rrdgraph_graph – rrdtool graph command reference SynopsisPRINT:vname:format GPRINT:vname:format COMMENT:text VRULE:time#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]] HRULE:value#color[:legend][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]] LINE[width]:value[#color][:[legend][:STACK][:skipscale][:dashes[=on_s[,off_s[,on_s,off_s]…]][:dash-offset=offset]] AREA:value[#color][:[legend][:STACK][:skipscale]] TICK:vname#rrggbb[aa][:fraction[:legend]] SHIFT:vname:offset TEXTALIGN:{left|right|justified|center} PRINT:vname:CF:format (deprecated) GPRINT:vname:CF:format (deprecated) STACK:vname#color[:legend] (deprecated) DescriptionThese instructions allow you to generate your image or report. If you don’t use any graph elements, no graph is generated. Similarly, no report is generated if you don’t use print options. PRINTPRINT:vname:format[:strftime]…
rrdgraph_examples – Examples for rrdtool graph Synopsisrrdtool graph /home/httpd/html/test.png –img-format PNG followed by any of the examples below DescriptionFor your convenience some of the commands are explained here by using detailed examples. They are not always cut-and-paste ready because comments are intermixed with the examples. ExamplesData with multiple resolutions –end now –start end-120000s –width 400…
rrdgraph_data – preparing data for graphing in rrdtool graph SynopsisDEF:<vname>=<rrdfile>:<ds-name>:<CF>[:step=<step>][:start=<time>][:end=<time>][:reduce=<CF>] VDEF:vname=RPN expression CDEF:vname=RPN expression DescriptionThese three instructions extract data values out of the RRD files, optionally altering them (think, for example, of a bytes to bits conversion). If so desired, you can also define variables containing useful information such as maximum, minimum etcetera. Two of…
rrdgraph – Round Robin Database tool graphing functions Synopsisrrdtool graph|graphv filename [option …] [data definition …] [data calculation …] [variable definition …] [graph element …] [print element …] DescriptionThe graph function of RRDtool is used to present the data from an RRD to a human viewer. Its main purpose is to create a nice graphical…
rrdflushcached – Flush the values for a spcific RRD file from memory. Synopsisrrdtool flushcached [–daemon address] filename [filename …] DescriptionThe flushcached function connects to rrdcached, the RRD caching daemon, and issues a “flush” command for the given files. The daemon will put the files to the head of the update queue so they are written “soon”….
rrdfirst – Return the date of the first data sample in an RRA within an RRD Synopsisrrdtool first filename [–rraindex number] DescriptionThe first function returns the UNIX timestamp of the first data sample entered into the specified RRA of the RRD file. filename The name of the RRD that contains the data. –rraindex number The…
rrdfetch – Fetch data from an RRD. Synopsisrrdtool fetch filename CF [–resolution|-r resolution] [–start|-s start] [–end|-e end] [–daemon address] DescriptionThe fetch function is normally used internally by the graph function to get data from RRDs. fetch will analyze the RRD and try to retrieve the data in the resolution requested. The data fetched is printed to stdout. *UNKNOWN* data…
rrddump – dump the contents of an RRD to XML format Synopsisrrdtool dump filename.rrd [filename.xml] [–header|-h {none,xsd,dtd}] [–no-header] [–daemon address] > filename.xml DescriptionThe dump function writes the contents of an RRD in human readable (?) XML format to a file or to stdout. This format can be read by rrdrestore. Together they allow you to transfer your files…
rrdcreate – Set up a new Round Robin Database Synopsisrrdtool create filename [–start|-b start time] [–step|-s step] [–no-overwrite] [DS:ds-name:DST:dst arguments] [RRA:CF:cf arguments] DescriptionThe create function of RRDtool lets you set up new Round Robin Database (RRD) files. The file is created at its final, full size and filled with *UNKNOWN* data. filenameThe name of the RRD you…
rrdcgi – Create web pages containing RRD graphs based on templates Synopsis"#!/path/to/"rrdcgi [–filter] Descriptionrrdcgi is a sort of very limited script interpreter. Its purpose is to run as a cgi-program and parse a web page template containing special <RRD:: tags. rrdcgi will interpret and act according to these tags. In the end it will printout…
rrdcached – Data caching daemon for rrdtool Synopsisrrdcached [-P permissions] [-l address] [-s group] [-w timeout] [-z delay] [-f timeout] [-p pid_file] [-t write_threads] [-j journal_dir] [-F] [-g] [-b base_dir [-B]] Descriptionrrdcached is a daemon that receives updates to existing RRD files, accumulates them and, if enough have been received or a defined time has passed, writes the updates to the RRD file. A flush command…
rrdbuild – Instructions for building RRDtool OverviewIf you downloaded the source of RRDtool you have to compile it. This document will give some information on how this is done. RRDtool relies on services of third part libraries. Some of these libraries may already be installed on your system. You have to compile copies of the…
rrd2whisper – convert an RRD database to a whisper database Synopsyswrrd2whisper rrd_pathDescriptionThis command converts an RRD database to a whisper fixed-size database. The options are described below. Options–xFilesFactor The fraction of data points in a propagation interval that must have known values for a propagation to occur. -h, –help Show the embedded help.Authorwhisper is a…
rrd-beginners – RRDtool Beginners’ Guide SynopsisHelping new RRDtool users to understand the basics of RRDtool DescriptionThis manual is an attempt to assist beginners in understanding the concepts of RRDtool. It sheds a light on differences between RRDtool and other databases. With help of an example, it explains the structure of RRDtool database. This is followed…
rancid – Cisco configuration filter Synopsisrancid [-dlCV] [-t device_type] (-f filename | hostname) rancid [-dhlCV] -t device_type (-f filename | hostname) Descriptionrancid is a collection of perl(1) scripts which uses the login scripts (see clogin(1)) to login to a device, execute commands to display the configuration, etc, then filters the output for formatting, security, and…
rpntutorial – Reading RRDtool RPN Expressions by Steve Rader DescriptionThis tutorial should help you get to grips with RRDtool RPN expressions as seen in CDEF arguments of RRDtool graph. Reading Comparison OperatorsThe LT, LE, GT, GE and EQ RPN logic operators are not as tricky as they appear. These operators act on the two values…
rpmusage – display rpm packages last use Descriptionrpmusage will display for each package, the last date it was used (in days). It can be used to find unused packages. It use the atime field of all package’s files to do this job. Note : as it scan all files inodes, the run may be long…