dumpet: 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/dumpet - from package: dumpet

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

On Debian possible default full paths are:

/usr/bin/dumpet - from package: dumpet

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

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