Free Knowledge Resources


Linux Manual Pages


Free Software * Books

Source Code

Free Media

Linux

pmnsadd(1)

NAME

   pmnsadd - add new names to the Performance Co-Pilot PMNS

SYNOPSIS

   $PCP_BINADM_DIR/pmnsadd [-n namespace] file

DESCRIPTION

   pmnsmerge(1)  performs the same function as pmnsadd and is faster, more
   robust and more flexible. It is therefore recommended that pmnsmerge(1)
   be used instead.

   pmnsadd  adds  subtree(s)  of new names into a Performance Metrics Name
   Space (PMNS), as used by the components  of  the  Performance  Co-Pilot
   (PCP).

   Normally pmnsadd operates on the default Performance Metrics Name Space
   (PMNS), however if the -n option is specified an alternative  namespace
   is used from the file namespace.

   The default PMNS is found in the file $PCP_VAR_DIR/pmns/root unless the
   environment variable PMNS_DEFAULT is set, in which case  the  value  is
   assumed to be the pathname to the file containing the default PMNS.

   The  new  names are specified in the file, arguments and conform to the
   syntax for PMNS specifications, see pmns(5).  There is one PMNS subtree
   in  each  file,  and  the base PMNS pathname to the inserted subtree is
   identified by  the  first  group  named  in  each  file,  e.g.  if  the
   specifications begin

             myagent.foo.stuff {
                 mumble     123:45:1
                 fumble     123:45:2
             }

   then the new names will be added into the PMNS at the non-leaf position
   identified by myagent.foo.stuff, and following all other names with the
   prefix myagent.foo.

   The  new  names  must  be  contained  within  a  single  subtree of the
   namespace.  If disjoint subtrees  need  to  be  added,  these  must  be
   packaged into separate files and pmnsadd used on each, one at a time.

   All of the files defining the PMNS must be located within the directory
   that  contains  the  root  of  the  PMNS,  this  would   typically   be
   $PCP_VAR_DIR/pmns  for the default PMNS, and this would typically imply
   running pmnsadd as root.

   As a special case, if file contains a line that begins root {  then  it
   is  assumed  to  be a complete PMNS that needs to be merged, so none of
   the subtree extraction and rewriting is performed and  file  is  handed
   directly to pmnsmerge(1).

   Provided  some  initial  integrity  checks  are satisfied, pmnsadd will
   update the PMNS using pmnsmerge(1) - if this fails for any reason,  the
   original namespace remains unchanged.

CAVEAT

   Once  the  writing  of  the  new  namespace file has begun, the signals
   SIGINT, SIGHUP and SIGTERM will be ignored to protect the integrity  of
   the new files.

FILES

   $PCP_VAR_DIR/pmns/root   the   default   PMNS,  when  then  environment
                            variable PMNS_DEFAULT is unset

PCP ENVIRONMENT

   Environment variables with the prefix PCP_ are used to parameterize the
   file  and  directory names used by PCP.  On each installation, the file
   /etc/pcp.conf contains the  local  values  for  these  variables.   The
   $PCP_CONF  variable may be used to specify an alternative configuration
   file, as described in pcp.conf(5).

SEE ALSO

   pmnsdel(1), pmnsmerge(1), pcp.conf(5), pcp.env(5) and pmns(5).



Opportunity


Personal Opportunity - Free software gives you access to billions of dollars of software at no cost. Use this software for your business, personal use or to develop a profitable skill. Access to source code provides access to a level of capabilities/information that companies protect though copyrights. Open source is a core component of the Internet and it is available to you. Leverage the billions of dollars in resources and capabilities to build a career, establish a business or change the world. The potential is endless for those who understand the opportunity.

Business Opportunity - Goldman Sachs, IBM and countless large corporations are leveraging open source to reduce costs, develop products and increase their bottom lines. Learn what these companies know about open source and how open source can give you the advantage.


Free Software


Free Software provides computer programs and capabilities at no cost but more importantly, it provides the freedom to run, edit, contribute to, and share the software. The importance of free software is a matter of access, not price. Software at no cost is a benefit but ownership rights to the software and source code is far more significant.

Free Office Software - The Libre Office suite provides top desktop productivity tools for free. This includes, a word processor, spreadsheet, presentation engine, drawing and flowcharting, database and math applications. Libre Office is available for Linux or Windows.


Free Books


The Free Books Library is a collection of thousands of the most popular public domain books in an online readable format. The collection includes great classical literature and more recent works where the U.S. copyright has expired. These books are yours to read and use without restrictions.

Source Code - Want to change a program or know how it works? Open Source provides the source code for its programs so that anyone can use, modify or learn how to write those programs themselves. Visit the GNU source code repositories to download the source.


Education


Study at Harvard, Stanford or MIT - Open edX provides free online courses from Harvard, MIT, Columbia, UC Berkeley and other top Universities. Hundreds of courses for almost all major subjects and course levels. Open edx also offers some paid courses and selected certifications.

Linux Manual Pages - A man or manual page is a form of software documentation found on Linux/Unix operating systems. Topics covered include computer programs (including library and system calls), formal standards and conventions, and even abstract concepts.


birds banner