rc-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:

/sbin/rc-service - from package: openrc

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

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