ussp-push: 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/ussp-push - from package: ussp-push

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

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