policyvers: 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/policyvers - from package: selinux-utils

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

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