Why ```and/or```? I'm not sure that is a better formulation in this case (in English as well in French).

"You can install and uninstall CR with a sigle line in a terminal", in other words "You can do the both with your terminal". If you want to insist on the two separate scripts, I think it's better to use "or". 

(And for the story, the "et/ou" in French is not recommended, except in the familiar language and in newspapers: http://www.druide.com/enquetes/la-pseudo-conjonction-etou
In more formal writing, it must be avoided.

In English, it seems to be the same:
http://billbennett.co.nz/2009/09/26/writing-avoid-andor-slashes/
http://grammar.ccc.commnet.edu/grammar/plague.htm
http://grammar.quickanddirtytips.com/and-or-singular-plural.aspx)