[root@infodwtest ~]# ruby -v
ruby 2.1.8p440 (2015-12-16 revision 53160) [x86_64-linux]
[root@infodwtest ~]# ruby prova5.rb
Child 10288
kkkkk
finito ...
[root@infodwtest ~]# ruby prova2.rb
Parent is 10290
Parent eseguo: ruby /root/prova5.rb
Child 10292
kkkkk
finito ...
[root@infodwtest ~]#