dh_nativejava: 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/dh_nativejava - from package: libgcj-common

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

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