mwcfeedserver: 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/sbin/mwcfeedserver - from package: mwc

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

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