native2ascii: 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/lib/jvm/java-1.5.0-gcj-4.8-amd64/bin/native2ascii - from package: gcj-4.8-jdk
/usr/lib/jvm/java-1.5.0-gcj-4.9-amd64/bin/native2ascii - from package: gcj-4.9-jdk
/usr/lib/debug/usr/lib/jvm/java-7-openjdk-amd64/bin/native2ascii - from package: openjdk-7-dbg
/usr/lib/jvm/java-7-openjdk-amd64/bin/native2ascii - from package: openjdk-7-jdk

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

Error in other languages:
native2ascii: bevel nie gevind nie
native2ascii: comandă negăsită
native2ascii: comando não encontrado
native2ascii: commande introuvable
native2ascii: command not found
native2ascii: käsku ei ole
native2ascii: không tìm thấy lệnh
native2ascii: komanda nerasta
native2ascii: Kommando nicht gefunden.
native2ascii: kommandot finns inte
native2ascii: komut yok
native2ascii: nie znaleziono polecenia
native2ascii: níor aimsíodh an t-ordú
native2ascii: no se encontró la orden
native2ascii: no s'ha trobat l'ordre
native2ascii: opdracht niet gevonden
native2ascii: parancs nem található
native2ascii: perintah tidak ditemukan
native2ascii: príkaz nenájdený
native2ascii: příkaz nenalezen
native2ascii: команда не найдена
native2ascii: командата не е открита
native2ascii: 命令找不到
native2ascii: コマンドが見つかりません