keystone-all: 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/keystone-all - from package: keystone

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

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