newsbeuter: 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/newsbeuter - from package: newsbeuter

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

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