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Unix+clones

Running A MySQL-Based DNS Server: MyDNS

Post date: January 23, 2006, 15:01 Category: Network Views: 3608 Comments
Tutorial quote: In this tutorial I will describe how to install and configure MyDNS, a DNS server that uses a MySQL database as backend instead of configuration files like, for example, Bind or djbdns. This has the advantage that you can easily use web-based frontends to administrate your DNS records. You could even write your own frontend, e.g. using PHP, to interact with the MyDNS database. MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted! This is a major advantage.
Debian

Setting Up Unison File Synchronization Between Two Servers On Debian Squeeze

Post date: August 9, 2011, 08:08 Category: Installing Views: 1980 Comments
Tutorial quote: This tutorial shows how to set up file synchronization between two Debian Squeeze servers with Unison. Unison is a file-synchronization tool similar to rsync, but the big difference is that it tracks/synchronizes changes in both directions, i.e., files changed on server1 will be replicated to server2 and vice versa.
Solaris

Configuring the Behavior of the Solaris IP Filter Firewall

Post date: April 20, 2007, 18:04 Category: Network Views: 9114 Comments
Tutorial quote: When defining packet filtering rules in the /etc/ipf/ipf.conf file, it is necessary to understand how the Solaris IP Filter firewall reads this file and compares any packet against the rules in the file.
Ubuntu

Back In Time – A Simple backup tool for ubuntu

Post date: July 15, 2009, 21:07 Category: Software Views: 4612 Comments
Tutorial quote: Back In Time is a simple backup tool for Linux inspired from “flyback project” and “TimeVault”.The backup is done by taking snapshots of a specified set of directories.Keep in mind that Back In Time is just a GUI. The real magic is done by rsync (take snapshots and restore), diff (check if somethind changed) and cp (make hardlinks).
Fedora

Installing MyDNS And The MyDNSConfig Control Panel On Fedora 8

Post date: December 9, 2007, 12:12 Category: Installing Views: 3255 Comments
Tutorial quote: In this tutorial I will describe how to install and configure MyDNS and MyDNSConfig on Fedora 8. MyDNS is a DNS server that uses a MySQL database as backend instead of configuration files like, for example, Bind or djbdns. The advantage is that MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted. A secondary nameserver can be easily set up by installing a second instance of MyDNS that accesses the same database or, to be more redundant, uses the MySQL master / slave replication features to replicate the data to the secondary nameserver.
Debian

Installing MyDNS-NG & MyDNSConfig On Debian Squeeze

Post date: January 20, 2011, 12:01 Category: Installing Views: 2068 Comments
Tutorial quote: This tutorial will describe how to install and configure MyDNS-NG and MyDNSConfig 3 on Debian Squeeze. MyDNS-NG is a DNS server that uses a MySQL database as backend instead of configuration files. The advantage is that MyDNS simply reads the records from the database, and it does not have to be restarted/reloaded when DNS records change or zones are created/edited/deleted. A secondary nameserver can be easily set up by installing a second instance of MyDNS that accesses the same database or, to be more redundant, uses the MySQL master / slave replication features to replicate the data to the secondary nameserver.
Linux

Creating a safe directory with PAM and Encfs

Post date: June 7, 2006, 20:06 Category: Security Views: 3180 Comments
Tutorial quote: Now, in my network (and others) the credentials provided at login could (and should) be used by those programs. How can you retrieve these credentials, providing enough security?
With a the PAM modules pam_script it's possible to store the password in a file, which will be used by fusemb and mount.cifs to read the password from.

To achieve security, one could make the user logging in owner and deny read/write for anybody else. Remove this file when the user ends his/her session.
This is enough, for runtime. But I was wondering, but what if the system crashes, and the file with the credentials remains on the harddrive? Anybody who is able to mount this harddrive with for example a lifecd, can read this file!

That's why I was looking for a way to encrypt this file.

With encfs this is very possible! At run time it gives an interface to encrypted files and directories, which does only exist at runtime! When the system is not running, there are only encrypted files, useless when you do not know the key to it. And this key is exactly the (encrypted) password! That's why I've chosen for a combination of PAM and Encfs.
Ubuntu

Pybackpack - A user friendly file backup tool for Ubuntu Linux Desktop

Post date: September 7, 2008, 16:09 Category: System Views: 3339 Comments
Tutorial quote: A graphical tool to make file backup simpler. Provides a user-friendly interface which allows you to back up your files easily to an archive, to a CD/DVD or to a remote location using SSH.pybackpack is a user-friendly file backup tool written for the Gnome desktop and released under the GPL.

Linux

NFS over CIPE-VPN tunnels

Post date: May 23, 2005, 16:05 Category: Network Views: 2871 Comments
Tutorial quote: The Network File System (NFS) is a standard protocol for sharing file services with Linux and Unix computers. It is a distributed file system that enables local access to remote disks and file systems and is based on the client\server architecture. Although easy to configure, it is typically used only to transfer data over an intranet or LAN because of its transparency and security potholes when exposed to the risks of the Internet. However, it still can be employed -- without compromising security -- to share files over the Internet by configuring it to run on a Virtual Private Network (VPN) connection. This article will show you how to set up NFS to run over a CIPE-VPN connection between two Linux systems.
Debian

Recovering from file system corruption using TestDisk

Post date: August 12, 2006, 18:08 Category: System Views: 2844 Comments
Tutorial quote: We've all been there. We press the wrong key, we do some silly mistake, and suddenly, one or more of our file systems refuse to work. Whenever this happens, the first thing we hear is "You should have made a backup", the dreaded sentence that we'll never listen to. Let's face it, we're stupid, and we don't backup.
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