This is what I get after inputing that command

-sh: /opt/showtime/bin/showtime: not found
~ $ sudo gainroot
Root shell enabled


BusyBox v1.10.2 (Debian 3:1.10.2.legal-1osso30+0m5) built-in shell (ash)
Enter 'help' for a list of built-in commands.

/home/user # /opt/showtime/bin/showtime
/bin/sh: /opt/showtime/bin/showtime: not found
/home/user # /opt/showtime/bin/showtime
/bin/sh: /opt/showtime/bin/showtime: not found
/home/user # c

Or am I doing something wrong?