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.
The “Virus Bounce Ruleset” is a SpamAssassin ruleset to catch “backscatter”.
Backscatter is mail you didn’t ask to receive, generated by legitimate, non-spam-sending systems in response to spam.
Idea how to implement tracking last user pop3 or imap login date using dovecot is described in Dovecot Wiki.
Maybe you know, maybe not, but pre-build Debian Lenny packages of dovecot from backports has been built with sieve plugin.
Digmia Enterprise Linux Source is repository with many interesting and actual packages for Centos (RHEL). It contais for example mysql-5.0.84-2.el5.x86_64.rpm, php-5.2.10-2.el5.x86_64.rpm, zabbix-1.8.3-2.el5.x86_64.rpm, postgresql-8.2.14-1.el5.x86_64.rpm and many more.
When you are running bonding in active-backup mode, you can detect which slave is active by listing /proc/net/bonding/bond0. How to change active slave?
Enable stateless offloads to improve system performance.
Stateless offloads, such as checksum offload, segmentation offload, and large receive offload, can improve system performance by moving some of the processor-intensive tasks that do not require a connection to the network adapter.
LVM is a logical volume manager for the Linux kernel; it manages disk drives and similar mass-storage devices, in particular large ones. The term “volume” refers to a disk drive or partition thereof.
Every LVM operation makes backup of lvm metadata. Metadata archive stored in directory /etc/lvm/archive/ in easily readable text files. Each operation creates own metadata backup file, with information when it was created. For example:
When you need install some package to old discontinued debian, you will get
Error 404 Not Found
Solution is change /etc/apt/sources.list
deb http://archive.debian.org/debian/ etch main non-free contrib
Very often problems like ‘my website is not working’ or ‘I did not get any emails’ are caused by improperly set up dns records or expired domain. At my work, I’m permanently dealing with incorrectly set up dns records. There are available services like intodns.com which you can use to check dns records for domain. But what to do, if you have problem with reverse dns? Or you want to check, if your reverse delegation is set up correctly?