apparmor_parser: 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:

/sbin/apparmor_parser - from package: apparmor

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

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