digest-service: 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/lib/debug/usr/sbin/digest-service - from package: heimdal-dbg
/usr/sbin/digest-service - from package: heimdal-kdc

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

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