sulogin: 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/sulogin - from package: sysvinit-tools

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

On Debian possible default full paths are:

/sbin/sulogin - from package: sysvinit-utils

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

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