To install x3270 just follow these instructions.
sudo apt-get install x3270
Which will install x3270 and any other packages on which it depends.
|Maintainer||Bastian Blank <firstname.lastname@example.org>|
|Description||X11 program for telnet sessions to IBM mainframes window. It can also connect to an IBM AS/400 as a 5250 terminal using the AS/400's 3270 emulation. The window created by x3270 can use its own font for displaying characters, so it is a fairly accurate representation of an IBM 3278 or 3279.|