nup: 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/nup - from package: dvi2ps

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

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