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Search results for Disk ARchive (Backup and Restore) using dar and kdar(dar Frontend)

FreeBSD

Using Software RAID-1 with FreeBSD

Post date: April 28, 2008, 17:04 Category: System Views: 7163 Comments
Tutorial quote: Have you ever needed a software RAID solution for a low-end server install? Perhaps you've wanted your workstation to take advantage of the redundancy provided by a disk mirror without investing in a hardware RAID controller. Has a prior painful configuration experience turned you off software RAID altogether on Unix systems?

Since 5.3-Release, FreeBSD comes with gmirror(8), which allows you to easily configure a software RAID 1 solution.
Unix+clones

Enhance boot-time security with GRUB passwords

Post date: April 26, 2006, 13:04 Category: Security Views: 3695 Comments
Tutorial quote: The security of data files on your computer is at risk, and not just because you are connected to the Internet. Anyone with physical access to your machine can bypass all passwords to gain entry to your hard disk with one simple command given to the bootloader. Fortunately, the popular GRand Unified Bootloader (GRUB) is equipped with security features to prevent such an 'attack.' It can password protect each entry of your boot menu.
Linux

Replacing A Failed Hard Drive In A Software RAID1 Array

Post date: January 30, 2007, 17:01 Category: System Views: 4434 Comments
Tutorial quote: This guide shows how to remove a failed hard drive from a Linux RAID1 array (software RAID), and how to add a new hard disk to the RAID1 array without losing data.
BSD

Managing Filesystems : fstab

Post date: April 15, 2005, 23:04 Category: System Views: 7827 Comments
Tutorial quote: Understanding how the BSD filesystem manages disk space is critical to successfully managing a BSD server or workstation. However, this topic is generally overlooked since it is rarely used outside of installation and upgrades. It is also a very simple topic and most people assume you understand how it all works.

This article gives a quick synopsis on filesystem layout and tries to briefly explain how to understand /etc/fstab. The fstab(5) man pages, while good, do little to teach the basics to new sysadmins.
Mandriva

Setting Up An NFS Server And Client On Mandriva 2010.1 Spring

Post date: January 18, 2011, 13:01 Category: Installing Views: 4465 Comments
Tutorial quote: This guide explains how to set up an NFS server and an NFS client on Mandriva 2010.1 Spring. NFS stands for Network File System; through NFS, a client can access (read, write) a remote share on an NFS server as if it was on the local hard disk.
CentOS

How To Set Up MySQL Database Replication With SSL Encryption On CentOS 5.4

Post date: February 18, 2010, 13:02 Category: Miscellaneous Views: 5429 Comments
Tutorial quote: This tutorial describes how to set up database replication in MySQL using an SSL connection for encryption (to make it impossible for hackers to sniff out passwords and data transferred between the master and slave). MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures.
Ubuntu

How To Set Up MySQL Database Replication With SSL Encryption On Ubuntu 9.10

Post date: February 9, 2010, 01:02 Category: Installing Views: 3546 Comments
Tutorial quote: This tutorial describes how to set up database replication in MySQL using an SSL connection for encryption (to make it impossible for hackers to sniff out passwords and data transferred between the master and slave). MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures.
Unix+clones

How To Set Up Database Replication In MySQL

Post date: December 14, 2005, 19:12 Category: Software Views: 4689 Comments
Tutorial quote: This tutorial describes how to set up database replication in MySQL. MySQL replication allows you to have an exact copy of a database from a master server on another server (slave), and all updates to the database on the master server are immediately replicated to the database on the slave server so that both databases are in sync. This is not a backup policy because an accidentally issued DELETE command will also be carried out on the slave; but replication can help protect against hardware failures though.

In this tutorial I will show how to replicate the database exampledb from the master with the IP address 192.168.0.100 to a slave. Both systems (master and slave) are running Debian Sarge; however, the configuration should apply to almost all distributions with little or no modification.
Linux

Breaking the SHELL

Post date: May 29, 2005, 01:05 Category: Programming Views: 3896 Comments
Tutorial quote: Shell scripts are a part and parcel of almost all software applications running on UNIX, and the use simply spans from a trivial script, managing automatic database backup to bunch of scripts collaboratively doing complex operation on regular expressions.

Though it's a mere design decision to partition modules between scripts and programming language, but I personally feel that they sometimes come very handy saving lot of time and lines of code, when compared to implementing the same functionality in the programming language in context.And in fact with some exceptions, complexity of a shell script can scale to that of codes in C language. Add to this the power of all those numerous UNIX commands, and just think through, what can be achieved by shell scripts.
Here I will discuss few topics mainly relevant to intermediate shell programmers
Linux

Tools to delete files securely in GNU/Linux

Post date: January 5, 2009, 18:01 Category: Benchmarks Views: 8531 Comments
Tutorial quote: Deleting a file or reformatting a disk does not destroy your sensitive data. The data can easily be undeleted. That’s a good thing if you accidentally throw something away, but what if your trying to destroy financial data, bank account passwords, or classified company information. In this article you will learn number of tools(Shred,Wipe,srm,smem,sfill,sswap,DBAN) to delete files securely in GNU/ Linux

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