shake: 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/shake - from package: shake

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

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