xkbwatch: 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/xkbwatch - 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/xkbwatch - from package: x11-xkb-utils

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

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