deborphan: 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/deborphan - from package: deborphan

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

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