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Debian

How To Set Up suPHP With PHP4 And PHP5

Post date: June 17, 2006, 06:06 Category: Security Views: 3837 Comments
Tutorial quote: This tutorial shows how to install and use suPHP with PHP4 and PHP5. suPHP is a tool for executing PHP scripts with the permissions of their owners instead of the Apache user. With the help of suPHP you can also have PHP4 and PHP5 installed at the same time which I will describe at the end of this article.
Debian

How To Set Up Apache2 With mod_fcgid And PHP5 On Debian Etch

Post date: February 3, 2009, 09:02 Category: Installing Views: 3903 Comments
Tutorial quote: This tutorial describes how you can install Apache2 with mod_fcgid and PHP5 on Debian Etch. mod_fcgid is a compatible alternative to the older mod_fastcgi. It lets you execute PHP scripts with the permissions of their owners instead of the Apache user.
Linux

vimdiff - Edit two or Three versions of a file with Vim and show differences

Post date: April 8, 2009, 06:04 Category: System Views: 3914 Comments
Tutorial quote: Vimdiff starts Vim on two (or three) files. Each file gets its own window. The differences between the files are highlighted.This is a nice way to inspect changes and to move changes from one version to another version of the same file.

Unix+clones

Sudo FAQ

Post date: February 26, 2007, 21:02 Category: Security Views: 4259 Comments
Tutorial quote: Sudo is a simple program which allows the administrator to give regular users extra permissions to execute the commands they would normally not be allowed to use. Thanks to sudo, we can execute commands that are usually restricted to the root account. In practice, it looks like that: instead of typing su ->password -> command you type sudo command. In order to use sudo you need to configure it properly. This FAQ is supposed to help you with this task.
Debian

Setting Up Unison File Synchronization Between Two Servers On Debian Squeeze

Post date: August 9, 2011, 08:08 Category: Installing Views: 2005 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.
Linux

How to restore deleted file on ext2

Post date: December 15, 2006, 19:12 Category: System Views: 3054 Comments
Tutorial quote: This text describes the steps needed do recover the data of a file that was recently deleted.
Solaris

Configuring the Behavior of the Solaris IP Filter Firewall

Post date: April 20, 2007, 18:04 Category: Network Views: 9144 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.
Linux

HOWTO backup your linux system using bash, tar and netcat

Post date: April 2, 2006, 22:04 Category: System Views: 2785 Comments
Tutorial quote: I recently ran into the problem of not having enough hard drive space on my slackware linux laptop, but was lucky enough to have a much bigger drive sitting around from before and wanted a way to perform a hassle free seamless upgrade. i had this idea and it worked pretty well so i thought i would share it since i think it's pretty cool and only requires the use of two tools that should be included with all distributions.
Linux

Creating a safe directory with PAM and Encfs

Post date: June 7, 2006, 20:06 Category: Security Views: 3204 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.
Debian

Creating A Fully Encrypted Para-Virtualised Xen Guest System Using Debian Lenny

Post date: May 3, 2009, 10:05 Category: Miscellaneous Views: 3432 Comments
Tutorial quote: This document explains how to set up a fully encrypted para-virtualized XEN instance. In this howto, the host system is running Debian Etch, while the guest system to be installed will be using Debian Lenny. If you are concerned about your privacy, you might want to consider using hard disk encryption to protect your valuable private data from spying eyes. Usually, the easiest way would be to use your distribution's installer to set up a fully encrypted system; I think most recent Linux distributions support this. However, when you are using XEN to provide virtualization, there are situations where you might not want to encrypt your whole computer with all guest instances, but instead only encrypt one OS instance. This howto will deal with exactly this situation. It assumes that the XEN host system is already up and running.
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