func-list-vms-per-host: 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/func-list-vms-per-host - from package: func

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

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