vdsClient: 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/vdsClient - from package: vdsm-cli

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

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