checkgroups.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/checkgroups.pl - from package: inn2

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

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