bbackupd: 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/sbin/bbackupd - from package: boxbackup-client

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

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