downloaded package from http://search.cpan.org/dist/App-cpanminus/
navigated to download folder
typed:
tar zxf App-cpanminus-1.7004.tar.gz
cd App-cpanminus-1.7004/
perl Makefile.PL
make
make test
make install

##</code><code>##

[IrishMonk@localhost ~]$ cd Downloads/

[IrishMonk@localhost Downloads]$ cd App-cpanminus-1.7004/

[IrishMonk@localhost App-cpanminus-1.7004]$ perl Makefile.PL
Generating a Unix-style Makefile
Writing Makefile for App::cpanminus
Writing MYMETA.yml and MYMETA.json

[IrishMonk@localhost App-cpanminus-1.7004]$ make
Skip blib/lib/App/cpanminus.pm (unchanged)
Skip blib/lib/App/cpanminus/fatscript.pm (unchanged)
cp bin/cpanm blib/script/cpanm
/usr/bin/perl -MExtUtils::MY -e 'MY->fixin(shift)' -- 
blib/script/cpanm
Manifying blib/man1/cpanm.1
Manifying blib/man3/App::cpanminus.3pm
Manifying blib/man3/App::cpanminus::fatscript.3pm

[IrishMonk@localhost App-cpanminus-1.7004]$ make test
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/happy_cpantesters.t .. 1/1 # App::cpanminus/1.7004
t/happy_cpantesters.t .. ok   
All tests successful.
Files=1, Tests=1,  0 wallclock secs ( 0.03 usr  0.01 sys +  
0.03 cusr  0.00 csys =  0.07 CPU)
Result: PASS

[IrishMonk@localhost App-cpanminus-1.7004]$ make install
Appending installation info to /home/IrishMonk/perl5
/lib/perl5/i386-linux-thread-multi/perllocal.pod

[IrishMonk@localhost App-cpanminus-1.7004]$ cpanm
bash: cpanm: command not found...
Similar command is: 'cpan'

[IrishMonk@localhost App-cpanminus-1.7004]$