nuxwdog: 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/nuxwdog - from package: nuxwdog

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

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