lockout: 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/bin/lockout - from package: lockout

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

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