atmarpd: command not found

Have You tried accessing the binary with the full path?

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:

/sbin/atmarpd - from package: atm-tools

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