Terminator can't find Rails

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http://stackoverflow.com – I started using Terminator, the teminal emulator, but when I run a rails application it can't find Rails. humberto@asterix:~$ rails -v The program 'rails' can be found in the following packages: * rails * ruby-railties-3.2 Try: sudo apt-get install <selected package> Does anyone knows how to solve it? (HowTos)