sefcontext_compile: 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/sefcontext_compile - from package: selinux-utils

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

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