Linux have a set of many nice applications that could fit and run on your android device.
You can install ubuntu trusty on your android by creating an special partition on your external sdcard and installing the base system there. ** Your phone must be rooted ** preferable with cyanogenmod 11.
Android is weak by nature… If you want to keep your android secured, you should take a lot of considerations. Every day, the software is designed to be more and more intrusive, however, such level of intrusion could expose yourself to hackers.
Suppose that you are away from your home or work, and some issue happens suddenly with your server, or you want to test something on your server right now. You can use your blackberry device to reach your server from anywhere.
Continue reading SSH: A path from linux to linux using blackberry