If you installed Perl using apt-get, you should also install all other modules using apt-get:

apt-get install libexpect-perl libterm-vt102-perl libdata-dumper
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Most likely, Data::Dumper is already installed, unless your OS vendor crippled your Perl installation. Then maybe you can get the core modules that should be distributed with Perl in a package named perl-core or something like that.

You've got answers enough already that should guide you to success. I'd like to expand on this error message.

If you have installed perl and cpan, it is most often way more comfortable to type $ cpan Data::Dumper directly. No need for the install keyword. If you still prefer the module approach, quote the module name like perl -MCPAN -we'install "Data::Dumper"'

What you did shows something funny, which I cannot explain

$ perl -MCPAN -we'install Data::Dumper'
Can't locate object method "install" via package "Data::Dumper" at -e 
+line 1.

$ perl -MCPAN -we'install "Data::Dumper"'
:
Data::Dumper is up to date (2.161).

$ perl -MCPAN -wE'install Sys::Hostname'
Can't locate object method "install" via package "Sys::Hostname" at -e
+ line 1.

$ perl -MCPAN -wE'install "Sys::Hostname"'
:
The most recent version "1.22" of the module "Sys::Hostname"
is part of the perl-5.28.0 distribution. To install that, you need to 
+run
  force install Sys::Hostname   --or--
  install X/XS/XSAWYERX/perl-5.28.0.tar.gz

$ perl -MCPAN -wE'install Kitchen::Sink'
:
Warning: Cannot install Kitchen::Sink, don't know what it is.
Try the command

    i /Kitchen::Sink/

to find objects with matching identifiers.

$ perl -MCPAN -wE'install "Kitchen::Sink"'
:
Warning: Cannot install Kitchen::Sink, don't know what it is.
Try the command

    i /Kitchen::Sink/

to find objects with matching identifiers.
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perl -d:TraceUse ... does not show hints of Data::Dumper being loaded (Sys::Hostname is loaded), so I have no idea why some module pattern generate an error where others do not.

I failed googling for this OS ... could you provide a link?

update

you most likely mean Ubuntu, but there are so many flavors out there ...

apt-get install libexpect-perl libterm-vt102-perl libdata-dumper
above are installed.

Is there any way to check if module is loaded and installed on perl ?

I usually do perldoc -l Data::Dumper at the command line. Just tried it on one of my systems, and I got

/usr/lib/x86_64-linux-gnu/perl/5.26/Data/Dumper.pm
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in response. To find out the version, I grep for version in that file ..

$ grep -i '^version' /usr/lib/x86_64-linux-gnu/perl/5.26/Data/Dumper.p
+m
Version 2.167  (January 4 2017)
$
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Conversely, if the perldoc approach doesn't turn anything up, either the module isn't installed -- or it doesn't have POD. Then you could try using it in the debugger:

$ perl -MData::Dumper -de 1

Loading DB routines from perl5db.pl version 1.51
Editor support available.

Enter h or 'h h' for help, or 'man perldebug' for more help.

main::(-e:1):   1
  DB<1>
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If that loads OK, then the module does exist. If Perl can't find the module, it'll complain.

Alex / talexb / Toronto

Thanks PJ. We owe you so much. Groklaw -- RIP -- 2003 to 2013.

See the FAQ: How do I find which modules are installed on my system?

> Is there any way to check if module is loaded and installed on perl ?

There are many ways:

perl -MModule::Metadata -le'$i=Module::Metadata->new_from_module($ARGV
+[0]);print $i->{filename}' Data::Dumper
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perl -MExtUtils::Installed -le'$i=ExtUtils::Installed->new;print grep 
+/$ARGV[0]/, $i->files("Perl")' Dumper
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perl -MFile::Find -le'find(sub{print $File::Find::name if /$ARGV[0]/},
+$_) for @INC' Dumper
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I use whichpm. It's a module on its own and needs to be installed.