reverse-build-depends: 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/reverse-build-depends - from package: ubuntu-dev-tools

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

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