vxi11-cli-2: 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/vxi11-cli-2 - from package: python-vxi11

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

Error in other languages:
vxi11-cli-2: bevel nie gevind nie
vxi11-cli-2: comandă negăsită
vxi11-cli-2: comando não encontrado
vxi11-cli-2: commande introuvable
vxi11-cli-2: command not found
vxi11-cli-2: käsku ei ole
vxi11-cli-2: không tìm thấy lệnh
vxi11-cli-2: komanda nerasta
vxi11-cli-2: Kommando nicht gefunden.
vxi11-cli-2: kommandot finns inte
vxi11-cli-2: komut yok
vxi11-cli-2: nie znaleziono polecenia
vxi11-cli-2: níor aimsíodh an t-ordú
vxi11-cli-2: no se encontró la orden
vxi11-cli-2: no s'ha trobat l'ordre
vxi11-cli-2: opdracht niet gevonden
vxi11-cli-2: parancs nem található
vxi11-cli-2: perintah tidak ditemukan
vxi11-cli-2: príkaz nenájdený
vxi11-cli-2: příkaz nenalezen
vxi11-cli-2: команда не найдена
vxi11-cli-2: командата не е открита
vxi11-cli-2: 命令找不到
vxi11-cli-2: コマンドが見つかりません