rnews: 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/rnews - from package: inn2-inews
/usr/lib/news/bin/rnews - from package: inn2-inews
/usr/bin/rnews - from package: inn

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

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