Purpose: Use MQTT on the command line and / or in a script
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Dependency Net::MQTT::Simple needs to be build an installed

cd $HOME
su # Login as root
wget https://metacpan.org/release/JUERD/Net-MQTT-Simple-1.26/raw/bin/mqtt-simple?download=1
chmod 740 mqtt-simple.pl
wget https://cpan.metacpan.org/authors/id/J/JU/JUERD/Net-MQTT-Simple-1.26.tar.gz  # To get Net::MQTT::Simple
tar xf Net-MQTT-Simple-1.26.tar.gz
cd Net-MQTT-Simple-1.26/
cat README # And read the contents of this README file
perl Makefile.PL # Should result in:
  Checking if your kit is complete...
  Looks good
  Generating a Unix-style Makefile
  Writing Makefile for Net::MQTT::Simple
  Writing MYMETA.yml and MYMETA.json
make # Should result in:
  cp lib/Net/MQTT/Simple/SSL.pm blib/lib/Net/MQTT/Simple/SSL.pm
  cp lib/Net/MQTT/Simple.pm blib/lib/Net/MQTT/Simple.pm
  cp bin/mqtt-simple blib/script/mqtt-simple
  "/usr/bin/perl" -MExtUtils::MY -e 'MY->fixin(shift)' -- blib/script/mqtt-simple
  Manifying 1 pod document
  Manifying 2 pod documents
make test # Should result in:
  PERL_DL_NONLAZY=1 "/usr/bin/perl" "-MExtUtils::Command::MM" "-MTest::Harness" "-e" "undef *Test::Harness::Switches; test_harness(0, 'blib/lib', 'blib/arch')" t/*.t
  t/regex.t .. ok     
  t/use.t .... ok   
  All tests successful.
  Files=2, Tests=561,  0 wallclock secs ( 0.07 usr  0.00 sys +  0.25 cusr  0.02 csys =  0.34 CPU)
  Result: PASS
make install # Should result in:
  Manifying 1 pod document
  Manifying 2 pod documents
  Installing /usr/local/share/perl/5.28.1/Net/MQTT/Simple.pm
  Installing /usr/local/share/perl/5.28.1/Net/MQTT/Simple/SSL.pm
  Installing /usr/local/man/man1/mqtt-simple.1p
  Installing /usr/local/man/man3/Net::MQTT::Simple::SSL.3pm
  Installing /usr/local/man/man3/Net::MQTT::Simple.3pm
  Installing /usr/local/bin/mqtt-simple
  Appending installation info to /usr/local/lib/x86_64-linux-gnu/perl/5.28.1/perllocal.pod
exit # Back to being a normal user
$HOME/mqtt-simple --host somehostname.tld --color --subscribe "somehostname/sometopic"

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