langford_rx_rf_bb_vga: 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/langford_rx_rf_bb_vga - from package: langford-utils

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

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