mdhost.exe: 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/monodevelop/bin/mdhost.exe - from package: monodevelop

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

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