atmdump: 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 Debian possible default full paths are:

/usr/bin/atmdump - from package: atm-tools

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

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