salt: 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 - from package: salt-master

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

On Debian possible default full paths are:

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

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

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