wol-bootptab: 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/wol-bootptab - from package: wol

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

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