service_stopped: 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:

/lib/rc/bin/service_stopped - from package: openrc

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

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