amdump: 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/sbin/amdump - from package: amanda-server

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

On Debian possible default full paths are:

/usr/sbin/amdump - from package: amanda-server

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

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