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Backing Up and Restoring Using the cpio Command in Linux and Unix

Post date: May 26, 2006, 18:05 Category: System Views: 2670 Comments
Tutorial quote: The cpio command is one of the most commonly used Linux back up tools.

The cpio command has two unusual features

Unlike tar , in which the files to back up are typed in as part of the command, cpio reads the files to work with from the standard input (in other words, the screen).

This feature means that cpio must be used as part of a multiple command or with a redirection pipe. Examples of this usage are shown in the tables below.

cpio must always be used with one of three flags. Flags are options that set the mode in which the command runs. Only one flag can be used at a time, and it must come before any other options. In addition, the choice of flags limits the options that can be used. Each flag also has a gnu option that can used in its place. The gnu option gives a convenient name for each flag: extract, create, and pass- through.
Linux

Controlling your locale with environment variables

Post date: May 2, 2006, 12:05 Category: System Views: 2712 Comments
Tutorial quote: People all over the world use Linux in dozens of languages. Since Linux's source code is free and open, speakers of minority languages can add support for their languages themselves, even though a large corporation might not consider them a worthwhile market. If you use more than one language, or a language other than English, you should know about Linux's use of locales to support different languages. Indeed, understanding locales can be useful even if you only use English.
Linux

Running .Net applications on Linux with Mono

Post date: April 26, 2006, 13:04 Category: Software Views: 2569 Comments
Tutorial quote: Imagine the fate of your company rests on your completing your new Linux project on time. You have a crack team of first-class developers, but they're all .Net programmers. What are you going to do? Admit that Windows is better that Linux? Cry? Resign? No, you're going to install Mono and save the world!
Linux

How to configure a low-cost load-balanced LAMP cluster

Post date: April 25, 2006, 11:04 Category: Network Views: 5928 Comments
Tutorial quote: The ubiquitous Linux, Apache, MySQL, and PHP/Perl/Python (LAMP) combination powers many interactive Web sites and projects. It's not at all unusual for demand to exceed the capacity of a single LAMP-powered server over time. You can take load off by moving your database to a second server, but when demand exceeds a two-server solution, it's time to think cluster.
Linux

Scheduling Backup Jobs using at and crontab

Post date: April 21, 2006, 16:04 Category: Installing Views: 2144 Comments
Tutorial quote: You can schedule a command or a script using two tools

crontab : Schedules tasks once or repeatedly.

You can use the crontab command to run commands at regular times. For example, you could schedule a backup of your files every Friday. Commands can be scheduled to the minute.

at : Schedules tasks once.

You can use the at command to schedule a command or script to run a single time. The command includes several utilities
Linux

Howto install the base Linux system onto a USB thumbdrive with the root partition encrypted

Post date: April 20, 2006, 12:04 Category: System Views: 2741 Comments
Tutorial quote: This howto will explain how to install a very basesystem onto a USB thumbdrive with the root partition encrypted. It includes support for cryptsetup-luks, and udev.
Linux

Taking backup using tar command in linux and unix

Post date: April 18, 2006, 15:04 Category: Installing Views: 2176 Comments
Tutorial quote: The tar backup program is an archiving program designed to store and extract files from an archive file known as a tarfile. A tarfile may be made on a tape drive; however, it is also common to write a tarfile to a normal file.
Linux

HOWTO: Hosting a Subversion Repository

Post date: April 17, 2006, 17:04 Category: Software Views: 7111 Comments
Tutorial quote: This document explains in details the procedure to setup a subversion repository (with trac/viewvc) in Linux based environment. Depending on the needs, one of the following three schemes can be selected.
Linux

Building a Linux supercomputer using SSH and PVM

Post date: April 11, 2006, 21:04 Category: Network Views: 3112 Comments
Tutorial quote: If you have a couple of old Linux boxes sitting around, then you've got the makings of a supercomputer. Dust them off, install Secure Shell (SSH) and Parallel Virtual Machine (PVM), and start your complex algorithms.
Linux

Removing A User

Post date: April 8, 2006, 00:04 Category: System Views: 3896 Comments
Tutorial quote: Employee turnover in most organizations runs high. So unless you run a small shop with a stable user base, you need to learn how to clean up after an employee leaves. Too many so-called system administrators do not understand the stakes involved when they manage users. Disgruntled former employees can often cause significant trouble for a company by gaining access to the network.

To remove a user, you need to learn to manage all of his or her files, mailboxes, mail aliases, print jobs, recurring –(automatic) personal processes such as the backing up of data or remote syncing of directories, and other references to the user. It is a good idea at first to disable the account in /etc/passwd, after which you can search for the user's files and other references. Once all traces of the user have been cleaned up, you can remove the user completely—but if you remove the entry from /etc/passwd while these other references exist, you have a harder time referring to them .

When you remove a user, it's a good idea to follow a pre-determined course of action so you don't forget any important steps; it may even be a good idea to make a checklist so that you have a routine. Following, you will find several items requiring attention.
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