mkbundle: 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 CentOS possible default full paths are:

/usr/bin/mkbundle - from package: mono-devel

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/mkbundle - from package: mono-devel

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

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