Provided by: perl-doc_5.14.2-6ubuntu2_all bug


       perlutil - utilities packaged with the Perl distribution


       Along with the Perl interpreter itself, the Perl distribution installs a range of
       utilities on your system. There are also several utilities which are used by the Perl
       distribution itself as part of the install process. This document exists to list all of
       these utilities, explain what they are for and provide pointers to each module's
       documentation, if appropriate.


          The main interface to Perl's documentation is "perldoc", although if you're reading
          this, it's more than likely that you've already found it. perldoc will extract and
          format the documentation from any file in the current directory, any Perl module
          installed on the system, or any of the standard documentation pages, such as this one.
          Use "perldoc <name>" to get information on any of the utilities described in this

       pod2man and pod2text
          If it's run from a terminal, perldoc will usually call pod2man to translate POD (Plain
          Old Documentation - see perlpod for an explanation) into a manpage, and then run man to
          display it; if man isn't available, pod2text will be used instead and the output piped
          through your favourite pager.

       pod2html and pod2latex
          As well as these two, there are two other converters: pod2html will produce HTML pages
          from POD, and pod2latex, which produces LaTeX files.

          If you just want to know how to use the utilities described here, pod2usage will just
          extract the "USAGE" section; some of the utilities will automatically call pod2usage on
          themselves when you call them with "-help".

          pod2usage is a special case of podselect, a utility to extract named sections from
          documents written in POD. For instance, while utilities have "USAGE" sections, Perl
          modules usually have "SYNOPSIS" sections: "podselect -s "SYNOPSIS" ..." will extract
          this section for a given file.

          If you're writing your own documentation in POD, the podchecker utility will look for
          errors in your markup.

          splain is an interface to perldiag - paste in your error message to it, and it'll
          explain it for you.

          The "roffitall" utility is not installed on your system but lives in the pod/ directory
          of your Perl source kit; it converts all the documentation from the distribution to
          *roff format, and produces a typeset PostScript or text file of the whole lot.

       To help you convert legacy programs to Perl, we've included three conversion filters:

          a2p converts awk scripts to Perl programs; for example, "a2p -F:" on the simple awk
          script "{print $2}" will produce a Perl program based around this code:

              while (<>) {
                  ($Fld1,$Fld2) = split(/[:\n]/, $_, -1);
                  print $Fld2;

       s2p and psed
          Similarly, s2p converts sed scripts to Perl programs. s2p run on "s/foo/bar" will
          produce a Perl program based around this:

              while (<>) {
                  print if $printit;

          When invoked as psed, it behaves as a sed implementation, written in Perl.

          Finally, find2perl translates "find" commands to Perl equivalents which use the
          File::Find module. As an example, "find2perl . -user root -perm 4000 -print" produces
          the following callback subroutine for "File::Find":

              sub wanted {
                  my ($dev,$ino,$mode,$nlink,$uid,$gid);
                  (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
                  $uid == $uid{'root'}) &&
                  (($mode & 0777) == 04000);

       As well as these filters for converting other languages, the pl2pm utility will help you
       convert old-style Perl 4 libraries to new-style Perl5 modules.

          Query or change configuration of Perl modules that use Module::Build-based
          configuration files for features and config data.

          To display and change the libnet configuration run the libnetcfg command.

          The perlivp program is set up at Perl source code build time to test the Perl version
          it was built under.  It can be used after running "make install" (or your platform's
          equivalent procedure) to verify that perl and its libraries have been installed

       There are a set of utilities which help you in developing Perl programs, and in
       particular, extending Perl with C.

          perlbug is the recommended way to report bugs in the perl interpreter itself or any of
          the standard library modules back to the developers; please read through the
          documentation for perlbug thoroughly before using it to submit a bug report.

          This program provides an easy way to send a thank-you message back to the authors and
          maintainers of perl. It's just perlbug installed under another name.

          Back before Perl had the XS system for connecting with C libraries, programmers used to
          get library constants by reading through the C header files. You may still see "require
          ''" or similar around - the .ph file should be created by running h2ph on the
          corresponding .h file. See the h2ph documentation for more on how to convert a whole
          bunch of header files at once.

       c2ph and pstruct
          c2ph and pstruct, which are actually the same program but behave differently depending
          on how they are called, provide another way of getting at C with Perl - they'll convert
          C structures and union declarations to Perl code. This is deprecated in favour of h2xs
          these days.

          h2xs converts C header files into XS modules, and will try and write as much glue
          between C libraries and Perl modules as it can. It's also very useful for creating
          skeletons of pure Perl modules.

          enc2xs builds a Perl extension for use by Encode from either Unicode Character Mapping
          files (.ucm) or Tcl Encoding Files (.enc).  Besides being used internally during the
          build process of the Encode module, you can use enc2xs to add your own encoding to
          perl.  No knowledge of XS is necessary.

          xsubpp is a compiler to convert Perl XS code into C code.  It is typically run by the
          makefiles created by ExtUtils::MakeMaker.

          xsubpp will compile XS code into C code by embedding the constructs necessary to let C
          functions manipulate Perl values and creates the glue necessary to let Perl access
          those functions.

          Perl comes with a profiler, the Devel::DProf module. The dprofpp utility analyzes the
          output of this profiler and tells you which subroutines are taking up the most run
          time. See Devel::DProf for more information.

          prove is a command-line interface to the test-running functionality of Test::Harness.
          It's an alternative to "make test".

          A command-line front-end to "Module::CoreList", to query what modules were shipped with
          given versions of perl.

   General tools
       A few general-purpose tools are shipped with perl, mostly because they came along modules
       included in the perl distribution.

          piconv is a Perl version of iconv, a character encoding converter widely available for
          various Unixen today.  This script was primarily a technology demonstrator for Perl
          5.8.0, but you can use piconv in the place of iconv for virtually any case.

          ptar is a tar-like program, written in pure Perl.

          ptardiff is a small utility that produces a diff between an extracted archive and an
          unextracted one. (Note that this utility requires the "Text::Diff" module to function
          properly; this module isn't distributed with perl, but is available from the CPAN.)

          ptargrep is a utility to apply pattern matching to the contents of files in a tar

          This utility, that comes with the "Digest::SHA" module, is used to print or verify SHA

       These utilities help manage extra Perl modules that don't come with the perl distribution.

          cpan is a command-line interface to  It allows you to install modules or
          distributions from CPAN, or just get information about them, and a lot more.  It is
          similar to the command line mode of the CPAN module,

              perl -MCPAN -e shell

          cpanp is, like cpan, a command-line interface to the CPAN, using the "CPANPLUS" module
          as a back-end. It can be used interactively or imperatively.

          cpan2dist is a tool to create distributions (or packages) from CPAN modules, then
          suitable for your package manager of choice. Support for specific formats are available
          from CPAN as "CPANPLUS::Dist::*" modules.

          A little interface to ExtUtils::Installed to examine installed modules, validate your
          packlists and even create a tarball from an installed module.


       perldoc, pod2man, perlpod, pod2html, pod2usage, podselect, podchecker, splain, perldiag,
       roffitall, a2p, s2p, find2perl, File::Find, pl2pm, perlbug, h2ph, c2ph, h2xs, dprofpp,
       Devel::DProf, enc2xs, xsubpp, cpan, cpanp, cpan2dist, instmodsh, piconv, prove, corelist,
       ptar, ptardiff, shasum