step: 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/step - from package: step

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

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