bluefeather: 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/bluefeather - from package: ruby-bluefeather

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

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