compute_user: 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/compute_user - from package: selinux-utils

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

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