c7unbatch: 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/c7unbatch - from package: inn2-inews

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

Error in other languages:
c7unbatch: bevel nie gevind nie
c7unbatch: comandă negăsită
c7unbatch: comando não encontrado
c7unbatch: commande introuvable
c7unbatch: command not found
c7unbatch: käsku ei ole
c7unbatch: không tìm thấy lệnh
c7unbatch: komanda nerasta
c7unbatch: Kommando nicht gefunden.
c7unbatch: kommandot finns inte
c7unbatch: komut yok
c7unbatch: nie znaleziono polecenia
c7unbatch: níor aimsíodh an t-ordú
c7unbatch: no se encontró la orden
c7unbatch: no s'ha trobat l'ordre
c7unbatch: opdracht niet gevonden
c7unbatch: parancs nem található
c7unbatch: perintah tidak ditemukan
c7unbatch: príkaz nenájdený
c7unbatch: příkaz nenalezen
c7unbatch: команда не найдена
c7unbatch: командата не е открита
c7unbatch: 命令找不到
c7unbatch: コマンドが見つかりません