drbl-bug-report: 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/drbl-bug-report - from package: drbl

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

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