Question
~ # iotop
Error opening terminal: xterm-256color.
Answer
A1 (for PC):
export TERM=xterm-color
A2 (for Embedded Linux):
scp -r mipsel-buildroot-linux-gnu/sysroot/usr/share/terminfo root@192.168.1.12:/data/usr/share
export TERMINFO=/data/usr/share/terminfo