debdry: 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/debdry - from package: debdry

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

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