HyperTerminal replacement in Ubuntu

#sudo apt-get install minicom

attach Null-Modem cable or adapter onto computer, in my case I use RS232->USB adapter

#dmesg|grep tty

[13472.252393] usb 8-1: pl2303 converter now attached to ttyUSB0

This mean this device correspond to ttyUSB0

#sudo minicom -s

1. Serial Port setup.

2. Hit A change Serial Device to /dev/ttyUSB0, then hit E change to 9600 8N1 (example for access my NetScreeen 5GT)

3. Save setup as dfl

done.