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user@austria:~$ sudo cpan
Sorry, we have to rerun the configuration dialog for CPAN.pm due to so
+me missing parameters. Configuration will be written to
...
Would you like me to automatically choose some CPAN mirror sites for y
+ou? (This means connecting to the Internet) [yes] 
Looking for CPAN mirrors near you (please be patient)
Can't call method "http" on unblessed reference at /usr/share/perl/5.1
+8/CPAN/FirstTime.pm line 1868.

user@austria:~$ perl -V
Summary of my perl5 (revision 5 version 18 subversion 2) configuration
+:
...

user@austria:~$ uname -a
Linux austria 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 
+2014 x86_64 x86_64 x86_64 GNU/Linux