Hi Monks,
while doing the initial setup of a server (that will host a web application) I've found something unexpected and I need your help to proceed with my job.
The installation of a new perl module (DBD::Oracle) gave me this output message:

Multiple copies of Driver.xst found in:
  /usr/local/lib/x86_64-linux-gnu/perl/5.22.1/auto/DBI/
  /usr/lib/x86_64-linux-gnu/perl5/5.22/auto/DBI/
  at Makefile.PL line 39.

Using DBI 1.636 (for perl 5.022001 on x86_64-linux-gnu-thread-multi)
  installed in /usr/local/lib/x86_64-linux-gnu/perl/5.22.1/auto/DBI/

[download]

I've searched and I found that the server seems to have two different "Perl installations" (forgive me if I'm not using the proper term)

Here follows an excerpt of the content of the two paths:

root@xyz# ll /usr/lib/x86_64-linux-gnu/perl5/5.22/auto/
total 44
drwxr-xr-x 11 root root 4096 May 27 09:48 ./
drwxr-xr-x 13 root root 4096 May 27 09:48 ../
drwxr-xr-x  3 root root 4096 May 13 16:19 Algorithm/
drwxr-xr-x  2 root root 4096 May 27 09:46 DBI/
drwxr-xr-x  2 root root 4096 May  9 16:48 FCGI/
drwxr-xr-x  3 root root 4096 May 13 16:19 File/
drwxr-xr-x  3 root root 4096 May  9 16:48 HTML/
drwxr-xr-x  2 root root 4096 May  9 16:47 LibAppArmor/
drwxr-xr-x  3 root root 4096 May  9 16:43 Locale/
drwxr-xr-x  4 root root 4096 May  9 16:43 Text/
drwxr-xr-x  3 root root 4096 May 27 09:48 YAML/

root@xyz# ll /usr/local/lib/x86_64-linux-gnu/perl/5.22.1/auto/
total 16
drwxrwxr-x 4 root root 4096 May 27 11:28 ./
drwxrwxr-x 7 root root 4096 May 27 08:19 ../
drwxrwxr-x 3 root root 4096 May 27 11:28 DBD/
drwxrwxr-x 2 root root 4096 May 27 08:19 DBI/

[download]

I don't want to have different installation on the server and, most of all, I don't want the new modules to be installed in the /usr/local/lib/ path, as it seems to be happening to the DBD::Oracle module.
I've found many posts/answers that explain how different (and coexistent) perl installations can be created; none of them tells how they can be deleted.
I would like to know if there is a procedure to recovery the main perl installation and roll back to a single "instance".
Will there be side effects if I delete all the content of the /usr/local/lib/ installation?

Thank you very much in advance.

In reply to Recovery of a "multi-perl" installation by haricot-48

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