salt-cloud: 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 CentOS possible default full paths are:

/usr/bin/salt-cloud - from package: salt-cloud

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/salt-cloud - from package: salt-cloud

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

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