bunbatch: 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/rnews.libexec/bunbatch - from package: inn2-inews

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

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