syncpackage: 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/syncpackage - from package: ubuntu-dev-tools

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

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