Dotdeb packages unattended upgrade
Unattended upgrades in Debian will not upgrade packages from third-party repositories (for example dotdeb.org) by default. It can be easily enabled editing /etc/apt/apt.conf.d/50unattended-upgrades.
Server side mail filtering with dovecot and squirrelmail
Maybe you know, maybe not, but pre-build Debian Lenny packages of dovecot from backports has been built with sieve plugin.
Still using debian etch?
When you need install some package to old discontinued debian, you will get
Error 404 Not FoundSolution is change /etc/apt/sources.list
deb http://archive.debian.org/debian/ etch main non-free contribSource http://linuxsysadminblog.com/2010/07/debian-ftp-archive-for-etch-archive-debian-org/
Hardware raid in debian
To manage and monitor hardware raid, you need proper utility. Most of vendors provides raid utilities only for Redhat based linuxes. For Debian based distribution I have found very useful repository - http://hwraid.le-vert.net/wiki/DebianPackages. You just need to know, which raid card you are using and follow provided instructions.
Remove todays debian installed packages
When you change your mind or you have installed packages on wrong server this magic command can help:
Zabbix 1.8 for Debian Lenny
Zabbix 1.8 for debian lenny can be installed from backports. There are available zabbix-server, zabbix-agent and zabbix-frontend-php in repository. This example shows how you can install zabbix-agent.
Zabbix-agent 1.8 for debian etch
There is change in zabbix-agent version 1.8, disk free space is returned in bytes. See 'Free disk space bug' in zabbix forum. This can cause problems when you want to use same template for debian lenny system with 1.8 zabbix-agents from backports and some still not upgraded etch systems. Backported 1.8 zabbix-agent for etch can be helpfull - you can find it here.