This document describes how to install a Postfix mail server that is based on virtual users and domains, i.e. users and domains that are in a MySQL database. I'll also demonstrate the installation and configuration of Courier (Courier-POP3, Courier-IMAP), so that Courier can authenticate against the same MySQL database Postfix uses.

Read the full thing at http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-squirrelmail-mandriva2008.1

Today's business world manifests an ongoing concern and hosts frequent discussions regarding Corporate Governance and Information Technology (IT) Governance, facts that result in increased pressure for certain players in the market. Thus, companies dedicated to maintaining their competitive advantages and reputation are re-evaluating their strategies and policies, putting their best efforts into genuinely committing to these concepts.

This document describes how to set up the Mandriva Directory Server (MDS) on Debian Etch. The resulting system provides a full-featured office server for small and medium companies - easy to administer via the web-based Mandriva Management Console (MMC).

Read the full thing at http://www.howtoforge.com/mandriva-directory-server-on-debian-etch

The advantage of such a "virtual" setup (virtual users and domains in a MySQL database) is that it is far more performant than a setup that is based on "real" system users. With this virtual setup your mail server can handle thousands of domains and users. Besides, it is easier to administrate because you only have to deal with the MySQL database when you add new users/domains or edit existing ones. No more postmap commands to create db files, no more reloading of Postfix, etc. For the administration of the MySQL database you can use web based tools like phpMyAdmin which will also be installed in this howto. The third advantage is that users have an email address as user name (instead of a user name + an email address) which is easier to understand and keep in mind.

This tutorial is based on Mandriva 2008.0 (i386). You should already have set up a basic Mandriva system

Read the full thing at http://www.howtoforge.com/virtual-users-domains-postfix-courier-mysql-mandriva2008.0

From nixCraft:

FTP is insecure protocol, but file-transfer is required all time. You can use OpenSSH Server to transfer file using SCP and SFTP (secure ftp) without setting up an FTP server. However, this feature also grants ssh shell access to a user. Basically OpenSSH requires a valid shell.

Read the full thing at http://www.cyberciti.biz/tips/rhel-centos-linux-install-configure-rssh-shell.html

From Howto forge:

Lighttpd is a secure, fast, standards-compliant web server designed for speed-critical environments. This tutorial shows how you can install Lighttpd on a Mandriva 2008.0 server with PHP5 support (through FastCGI) and MySQL support.

Read the full thing at http://www.howtoforge.com/lighttpd-php5-mysql-mandriva-2008.0

This technique - utilizing devilspie - will create a transparent terminal session on your desktop that will remain for the duration of your login (unless you exit the terminal session for some reason) This particular how-to addresses Ubuntu specifically, but I’ve done this successfully in 3 or 4 distributions.

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From Goudkov:

How to completely change your distribution on a remote box without a boot disk, with only ssh access, using only one partition, and with only one reboot at the very end of the conversion process. And by completely, I mean completely. You can delete every single file of the old distro if you want.

Read the full thing at http://www.goudkov.com/public/articles/changing_distro.jsp

You can prevent automatic running of the GUI when you boot your debian machine by disabling your login manager be it KDM, GDM or XDM from running at boot time. To disable the login manager from automatically running at boot up.

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From nixCraft:

Sometimes by mistake all file permissions get changed and you need to restore file permission. For example a shell script or some sort of corruption could change the permissions for packages (installed files), it may be necessary to reset them.

Read the full thing at http://www.cyberciti.biz/tips/reset-rhel-centos-fedora-package-file-permission.html