Perl IO:Pty support

This module is necessary for user/password authentification when is used ssh or other CLI access (not needed for REST API ones).
It is not needed when you use ssh-key based authorisation.

Install missing package under root

Linux RHEL, CentOS

# yum install perl-IO-Tty

Linux Debian, Ubuntu

# apt-get install libio-pty-perl 

AIX

Generaly there is no free available IO:Tty rpm for the latest Perl 5.3X from Linux toolbox, solution below works only for old Perl 5.8.8
Use ssh-key based authorisation as a workaround.

Download it here: perl-IO-Tty-1.07-1.aix5.1.ppc.rpm

# rpm -Uvh perl-IO-Tty-1.07-1.aix5.1.ppc.rpm

Unfortunatelly that does not work on AIXes with newer perl, you get this error:

error: Failed dependencies:
perl(:MODULE_COMPAT_5.8.8) is needed by perl-IO-Tty-1.07-1.ppc

There is unfortunately no solution, such module is not available for AIX.
The module is needed only for connection storage device using CLI (via ssh) with usage user/password method like IBM FlashSystem, Fujitsu ETERNUS and some others.
As a workaround you can use ssh-keys instead, that method does not require above perl module at all.

Test presence

cd /home/stor2rrd/stor2rrd
. etc/stor2rrd.cfg
$PERL -MIO::Pty -e ';'

When it prints error like "Can't locate IO/Pty.pm in @INC" then something is wrong with installation.