mkid: 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/bin/mkid - from package: id-utils

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

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