dump: 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:

/sbin/dump - from package: dump

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

On Debian possible default full paths are:

/sbin/dump - from package: dump

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

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