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 CentOS possible default full paths are:

/sbin/service - from package: initscripts

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/lib/pm-utils/bin/service - from package: pm-utils
/usr/sbin/service - from package: sysvinit-utils

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

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