salt-unity: 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-unity - from package: salt-master

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

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