newsax: 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/newsax - from package: ladr4-apps

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

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