bluecloth: 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/bluecloth - from package: ruby-bluecloth

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

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