Here is an overview on howto use ufw the Uncomplicated Firewall:

Lets turn UFW on:
sudo ufw enable

(more…)

It seems ipv6 is enabled by default in ubuntu and I’ve also heard that people are complaining that it slows them down. Here is a quick way to get rid of it.

vim /etc/modprobe.d/aliases

Look for the line which says alias net-pf-10 ipv6 and change it to alias net-pf-10 off ipv6

Restart your network or reboot for the change to take effect

If you want to use service command in ubuntu intrepid install sysvinit-utils package.This package contains the important System-V-like utilities.Specifically, this package includes: killall5, last, lastb, mesg, pidof, service, sulogin.
(more…)

Ubucleaner is a simple bash script that help you to keep your computer clean.

Note:- This is Only for advanced Ubuntu users

Ubucleaner Features
(more…)

Ubuntu is one of the few Linux distributions out there that will not enable the root account.If you want to do something with root permission on the console you have to type sudo before the command.

sudo” means superuser do. “sudo” will prompt for “Password:”. Please specify user password

(more…)

If you forgot you password for your ubuntu system you can recover using the following steps

Turn your computer on.

Press ESC at the grub prompt.

Press e for edit.

Highlight the line that begins kernel ………, press e

Go to the very end of the line, add rw init=/bin/bash

press enter, then press b to boot your system.

Your system will boot up to a passwordless root shell.

Type in passwd username

Set your password.

Type in reboot

Any user that has physical access to the keyboard can simply use the Ctrl+Alt+Delete key combination to reboot the server without having to log on. Sure, someone could simply unplug the power source, but you should still prevent the use of this key combination on a production server. This forces an attacker to take more drastic measures to reboot the server, and will prevent accidental reboots at the same time.
(more…)