xkbvleds: 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/xkbvleds - from package: xorg-x11-xkb-extras

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

On Debian possible default full paths are:

/usr/bin/xkbvleds - from package: x11-xkb-utils

You may install the required package with command apt-get install {package}

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