hp-config_usb_printer: 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/hp-config_usb_printer - from package: hplip

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

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