coffee: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/coffee - from package: coffee-script
/usr/lib/node_modules/coffee-script/bin/coffee - from package: coffee-script

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/coffee - from package: coffeescript

You may install the required package with command apt-get install {package}

Error in other languages:
coffee: bevel nie gevind nie
coffee: comandă negăsită
coffee: comando não encontrado
coffee: commande introuvable
coffee: command not found
coffee: käsku ei ole
coffee: không tìm thấy lệnh
coffee: komanda nerasta
coffee: Kommando nicht gefunden.
coffee: kommandot finns inte
coffee: komut yok
coffee: nie znaleziono polecenia
coffee: níor aimsíodh an t-ordú
coffee: no se encontró la orden
coffee: no s'ha trobat l'ordre
coffee: opdracht niet gevonden
coffee: parancs nem található
coffee: perintah tidak ditemukan
coffee: príkaz nenájdený
coffee: příkaz nenalezen
coffee: команда не найдена
coffee: командата не е открита
coffee: 命令找不到
coffee: コマンドが見つかりません