Disable line wrapping for output in the Terminal

Solution 1:

tput did the trick for me:

tput rmam

disables line wrapping.

tput smam

enables line wrapping.

Solution 2:

Pipe the output through less -S:

   -S or --chop-long-lines
          Causes lines longer than the screen width to be chopped (truncated)
          rather than wrapped.  That is, the portion of a long line that does
          not fit in the screen width is not shown.  The default is  to  wrap
          long lines; that is, display the remainder on the next line.

I tried to explain what might be going on here, though this won't result in a way to scroll horizontally with a scrollbar, as you seem to want.