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 CentOS possible default full paths are:

/usr/bin/checkpolicy - from package: checkpolicy

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/checkpolicy - from package: checkpolicy

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

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