scfg_train: 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 Debian possible default full paths are:

/usr/bin/scfg_train - from package: speech-tools

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

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