bluedevil-monolithic: command not found

Have You tried accessing the binary with the full path?

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/bluedevil-monolithic - from package: bluedevil

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