Simplify the following text for a Grade 14 native English-speaking person.
Original: Due to these serious problems rlogin was rarely used across untrusted networks ( like the public internet ) and even in closed deployments it has fallen into relative disuse ( with many Unix and Linux distributions no longer including it by default ) .
Simplified: Due to rlogin serious problems ; rlogin was rarely used across untrusted networks ( like the public internet ) also rlogin distributions are no longer included by default with many Unix and Linux distributions .