tomoyo-notifyd: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/sbin/tomoyo-notifyd - from package: tomoyo-tools

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