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Debian

Chrooted SSH/SFTP Tutorial (Debian Etch)

Post date: September 7, 2007, 22:09 Category: Security Views: 4445 Comments
Tutorial quote: This tutorial describes two ways how to give users chrooted SSH access. With this setup, you can give your users shell access without having to fear that they can see your whole system. Your users will be jailed in a specific directory which they will not be able to break out of. The users will also be able to use SFTP in their chroot jails.
Debian

Virtual Hosting With vsftpd And MySQL On Debian Etch

Post date: June 24, 2007, 23:06 Category: Installing Views: 3941 Comments
Tutorial quote: Vsftpd is one of the most secure and fastest FTP servers for Linux. Usually vsftpd is configured to work with system users. This document describes how to install a vsftpd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine.
OpenSUSE

gscan2pdf - Scan multiple Documents, import images to PDF & DjVu

Post date: August 27, 2008, 21:08 Category: Desktop Views: 4402 Comments
Tutorial quote: gscan2pdf is a simple but a very efficient GUI to scan documents of multiple pages and convert them into PDFs or DjVu format. You can also import images from image files into PDF files and vice versa. gscan2pdf only takes two clicks are required to scan several pages and then save all or a selection as a PDF file, including metadata if required.
Debian

Xen Cluster Management With Ganeti On Debian Etch

Post date: September 16, 2007, 21:09 Category: Miscellaneous Views: 3628 Comments
Tutorial quote: Ganeti is a cluster virtualization management system based on Xen. In this tutorial I will explain how to create one virtual Xen machine (called an instance) on a cluster of two physical nodes, and how to manage and failover this instance between the two physical nodes.
Linux

How To Implement SPF In Postfix

Post date: February 25, 2007, 21:02 Category: Miscellaneous Views: 5222 Comments
Tutorial quote: This tutorial shows how to implement SPF (Sender Policy Framework) in a Postfix 2.x installation. The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery. There are lots of SPF extensions and patches available for Postfix, but most require that you recompile Postfix. Therefore we will install the postfix-policyd-spf-perl package from openspf.org which is a Perl package and can be implemented in existing Postfix installations (no Postfix compilation required).
Debian

Postfix Monitoring With Mailgraph And pflogsumm On Debian Etch

Post date: June 26, 2007, 23:06 Category: Miscellaneous Views: 4363 Comments
Tutorial quote: This article describes how you can monitor your Postfix mailserver with the tools Mailgraph and pflogsumm. Mailgraph creates daily, weekly, monthly, and yearly graphs of sent, received, bounced, and rejected emails and also of spam and viruses, if SpamAssassin and ClamAV are integrated into Postfix (e.g. using amavisd-new). These graphs can be accessed with a browser, whereas pflogsumm (Postfix Log Entry Summarizer) can be used to send reports of Postfix activity per email.
Debian

Virtual Hosting With PureFTPd And MySQL (Incl. Quota And Bandwidth Management) On Debian Etch

Post date: May 4, 2007, 23:05 Category: Installing Views: 4237 Comments
Tutorial quote: This document describes how to install a PureFTPd server that uses virtual users from a MySQL database instead of real system users. This is much more performant and allows to have thousands of ftp users on a single machine. In addition to that I will show the use of quota and upload/download bandwidth limits with this setup. Passwords will be stored encrypted as MD5 strings in the database.
OpenSUSE

HowTo: Install configure KVM Virtualization & run Guest OSes in openSUSE

Post date: September 30, 2008, 21:09 Category: Emulation Views: 6693 Comments
Tutorial quote: Kernel-based Virtual Machine (KVM) is a Linux kernel virtualization infrastructure. KVM is a full virtualization solution for Linux on x86 hardware containing virtualization extensions Intel VT (vmx) or AMD-V (svm). It consists of a loadable kernel module, kvm.ko, that provides the core virtualization infrastructure and a processor specific module, kvm-intel.ko or kvm-amd.ko. KVM also requires a modified QEMU although work is underway to get the required changes upstream.
Debian

Retrieving Emails From Remote Servers With getmail (Debian Etch)

Post date: June 15, 2007, 22:06 Category: Software Views: 3875 Comments
Tutorial quote: Getmail is a program for retrieving emails from remote servers; it is very similar to fetchmail, but more flexible. For example, it can be configured to deliver mails directly to a Maildir or mbox mailbox without the need for an MTA such as Postfix, but of course it can also pipe the mails through an MTA if you want. Getmail can use so called filters such as SpamAssassin and ClamAV to scan the mails, and you can even tell getmail to delete mails on the original server only after a certain number of days.
Debian

Securing Debian Manual

Post date: January 1, 2008, 13:01 Category: Security Views: 4166 Comments
Tutorial quote: This document describes security in the Debian project and in the Debian operating system. Starting with the process of securing and hardening the default Debian GNU/Linux distribution installation, it also covers some of the common tasks to set up a secure network environment using Debian GNU/Linux, gives additional information on the security tools available and talks about how security is enforced in Debian by the security and audit team.
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