umockdev-wrapper: 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/umockdev-wrapper - from package: umockdev

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

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