Install VirtualBox Guest Additions on Ubuntu Server

On my work, I have a box with WinXP, running Virtual Box as a host, and a Ubuntu Server 9.10 box as a guest. My problem is that the firewall on the corporate network does not allow Ubuntu to update the date and time against any NTP server (like pool.ntp.org or ntp.ubuntu.com). So, I need [...]

Nullmailer keeps trying to send unsuccessful mails on Ubuntu

I have noticed that my Ubuntu box is lately always trying to reach a SMTP server (detected through Wireshark tool). After reviewing the list of running processes that contains the word mail (running ps aux | grep mail on console), I found a couple of them called Nullmailer that seems the responsible of that and [...]

Reinstalar Grub luego de instalar Windows

Luego de haber instalado Windows 7 hace algunos meses, en un equipo donde tenía tanto el Windows XP como Ubuntu 9.04, quedó inaccesible este último. Esto debido a que el instalador de Windows no reconoce otro sistema operativo que no sea propio de Microsoft (a diferencia de Linux).

Se debe tomar en cuenta NO utilizar [...]