nettle-lfib-stream: 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/nettle-lfib-stream - from package: nettle-bin

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

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