snappy: 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/snappy - from package: snappy

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

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