fipvlan: 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/sbin/fipvlan - from package: fcoe-utils

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

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