Check which version of DBI you have:

cpan -D DBI
[download]

Example output:

Done!
DBI
----------------------------------------------------------------------
+---
        (no description)
        T/TI/TIMB/DBI-1.633.tar.gz
        D:\perl\perl\vendor\lib\DBI.pm
        Installed: 1.631
        CPAN:      1.633  Not up to date
        Tim Bunce (TIMB)
        Tim.Bunce@pobox.com
[download]

Note that the installed version and cpan verison are listed, and it's pointed out where the installed module is not up to date. Just install the new version:

cpan DBI
[download]

Check out of date modules:

cpan -O
[download]

G'day bhushanQA,

To find out what version you're currently using:

$ perl -le 'use DBI; print $DBI::VERSION'
1.633
[download]

To find out what versions are currently available on CPAN, use http://search.cpan.org/ and enter DBI.

Upgrading on Linux is not really in my sphere of expertise. It will depend on which Linux you're using: the command may be yum, apt-get or possibly others — I'm sure other monks will provide a much better answer for this particular task.

If you're using your own (i.e. non-system) Perl, the cpan utility is provided with the core distribution. See its documentation for usage.

Another popular utility for installing CPAN modules is cpanm. I don't use this, so I won't comment further — again, other monks may provide more information about it.

This will print the installed version of DBI:

perl -MDBI -e 'die $DBI::VERSION'
[download]

This will install the current version from CPAN:

cpan DBI
[download]

If you are not using your own, self-compiled Perl, I recommend you use the vendor packaging system to install Perl modules instead of using CPAN. Not doing so will result in problems with binary compatibility if your vendor upgrades or downgrades module versions for compatibility reasons with their own tools.