The following materials are here for quick reference. To maximize the readers range and effectiveness they are published in English.

Git Survival Guide

Deleting Tag How to delete the tag v1.0 both local and remote repository: git tag -d v1.0 git push origin :refs/tags/v1.0 Undo a Commit How to revert back to a previous commit, undoing any previous commits: git reset HEAD~1 git push -f The number in above command states how many commits to undo. To revert […]

Performing Snapshot Based Backups on FreeBSD

Although the solution described below works, there are serious drawbacks since the snapshot generation takes enormously long time and renders the system unusable. Better approach of using a new ZFS file system is recommended. Nevertheless, FreeBSD cannot yet be installed on the ZFS directly and therefore it is a bit tricky to set up the […]

Postfix and Cyrus IMAPd with Active Directory Lookups on Debian

This has been a long struggle and many trial and error to get Postifx and Cyrus IMAPd working together with Microsoft Active Directory domain controller. Here are some notes about the whole process in case this needs to be redone in the future. Although similar setup was running on FreeBSD already, various reasons caused switching […]

Liferay Portal

Liferay portal is an “enterprise open-source solution” for publishing Java portlets. The portlet itself is a software component created in Java language that follows Java Portlet API specifications. Therefore the portlet is a piece of software that are written using the defined API standard. Which on the other hand will guarantee that this software component […]

Deploying Windows 7 using MDT 2010

PXE-E32: TFTP open timeout Suddenly over night my WDS deployment system stopped working. Booting from DHCP was OK, the IP address looked fine. But the PXE died with the error described above. It turned out that if WDS and DNS are installed on the same machine, they might by a chance occupy the same range […]

Creating Windows Domain With Win7 and Windows 2008 Server

These are some of the things that I have encountered past weeks when creating the Windows domain using Windows 2008 Server and Windows 7 clients. Internet Explorer 9 cannot be customized via GPP Group Policy Preferences are only enabled for Internet Explorer 5 … Internet Explorer 8. MS has said somewhere that GPP is not […]

How to create your own SSL CA?

How to create your own SSL certificate authority in order to roll out custom certificates for your services.

FreeBSD Ports System

From time to time I have to struggle with the FreeBSD ports system. In general it is a perfect repository to quickly build software packages from source tarballs automatically but there are some glitches especially if the system has been up and running for a while and the software upgrade mysteriously fails. Updating ports I […]