Formatting a Hard Disk Drive in Linux

This tutorial will explain how to format a HDD in Linux, You can use the method to format USB pens & HDDs also. The tutorial only explains how to format the HDD in EXT3 file system, Read the manual of the mkfs command to learn more.

# man mkfs

http://tiny.cc/MkV3n

Redirecting Your Emails from One Account to Another

This tutorial explains a simple method to redirect your emails to another account.

http://www.go2linux.org/how-to-use-the-.forward-file

Linux Unerace Undelete Command

This is a tutorial explaining how to undelete data in Linux

http://tiny.cc/tMJGW

As explained above, We can't undelete or unerace files in Linux, But try out the following live Linux distributions, These are used for system rescue operations.

Trinity Rescue Kit - Website
SystemRescueCd - Website

26/03/2008 - I found this article on how to undelete files form ext3 file system, interesting..

Finding All Hosts on a Network

This is nice little script to find out all hosts in a Linux or a Windows network

http://tiny.cc/aYs2h

Software Managment In Ubuntu

This community guide explains how to manage software in Ubuntu

https://help.ubuntu.com/community/SoftwareManagement

Want a GUI software manager

https://help.ubuntu.com/community/SynapticHowto

Using YUM and RPM in RedHat / Fedora / CentOS

This is a guide to learn all the things about RPM (Red Hat Package Manager)

http://docs.fedoraproject.org/drafts/rpm-guide-en

This is a guide to learn all the things about YUM (Yellow dog Updater, Modified)

http://docs.fedoraproject.org/yum/en

Enabling Compiz Fusion on Fedora

Read this tutorial to learn how to enable compiz fusion on Fedora

http://www.howtoforge.com/compiz-fusion-fedora8-nvidia-geforce-fx-5200-p2

Compiz Fusion Effects

Adding Cron Jobs in Linux (Schedule Tasks)

Tutorial about adding cron jobs in Linux (schedule tasks)

http://tiny.cc/DsJr7

Offline NT Password & Registry Editor

A cool bootable CD/Floppy to reset Admin password in M$ Windows, Be sure to read the FAQ section for some cool solutions.

http://home.eunet.no/pnordahl/ntpasswd

Removing Users From Groups In CentOS / RHEL / Fedora

Removing Users From Groups In CentOS / RHEL / Fedora In CLI

So many websites will explain how to add a user to a group, but if i need to remove a user from a group in the CLI how to do it, This is how..

If you don't know how to add a user to a group read the following tutorial.

http://tiny.cc/W0bzu

How to remove a user from a group.

I have not found any commands for this so I'll teach a manual method.

Assume there is a group call "group1" and there are three members in the group call "user1", "user2", "user3"

I want to remove "user2" from "group1"

1. The group details will be stored under two files call "group" and another call "gshadow", We'll examine the files first

# cat /etc/group

You'll find a line as follows

group1:x:503:user1,user2,user3

# cat /etc/gshadow

You'll find a line as follows

group1:!::user1,user2,user3

2. Now what we have to do is, manually remove "user2" from the "group1", Give the following command.

# vigr

The above command will open "/etc/group" file in VI text editor.

3. Use the down arrow key and go up to "group1:x:503:user1,user2,user3" line and press " i " to go to insert mode, and delete "user2" from the line, Now it'll look like this.

group1:x:503:user1,user3

Then press "esc" and type" :wq " to save and exit the file. It'll ask a question as follows,

You are using shadow groups on this system.
Would you like to edit /etc/gshadow now [y/n]?

Press " y " and press "enter"

Now it'll open "/etc/gshadow" file in VI text editor.

Use the down arrow key and go up to "group1:!::user1,user2,user3" line and press " i " to go to insert mode, and delete "user2" from the line, Now it'll look like this.

group1:!::user1,user3

Then press "esc" and type" :wq " to save and exit the file.

4. That's it, now the "user2" is removed from "group1"

This is another way to do it but you want be able to completely remove a user from the groups he/she belong to.

http://tiny.cc/zMm7x

Controlling Services In Linux

In a Linux box lot of services will be started during the startup, but we may not need all the services automatically getting started. We can turn off the unwanted services and make our system faster.

1. Read the following tutorial and get an idea about Linux services, although it's written for fedora, all these services will be similar in all Linux systems.

http://www.mjmwired.net/resources/mjm-services-f8.html

2. Controlling

In Ubuntu, RedHat, Fedora, CentOS (GUI)

Go to System -> Administration -> Services -> Unselect unwanted services

In Redhat, Fedora, CentOS (CLI)

# chkconfig servicename off

If you want to turn the service on again

# chkconfig servicename on

Or type

# ntsysv

And using the space bar you can select or unselect the services.