newgroup.pl: 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/lib/news/bin/control/newgroup.pl - from package: inn2

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

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