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

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

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