func-find-user: 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-find-user - from package: func

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

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