science-machine-learning: 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/science-machine-learning - from package: science-machine-learning

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

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