func-whatsmyname: 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-whatsmyname - from package: func

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

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