nstreams: 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/nstreams - from package: nstreams

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

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