Category Archives: Security
my package of the day – htmldoc – for converting html to pdf on the fly
PDF creation got actually fairly easy. OpenOffice.org, the Cups printing system, KDE provide methods for easily printing nearly everything to a PDF file right away. A feature that even outperforms most Windows setups today. But there are still PDF related … Continue reading
my package of the day – gpg for symmetric encryption
Though asymmetric encryption is state of the art today, there are still cases when you probably are in need of a simple symmetric encryption. In my case, I need an easy scriptable interface for encrypting files for backup as transparent … Continue reading
my package of the day – sash – the Stand Alone SHell for system recovery
Let me introduce you today to a package that is quite unknown as you hopefully never need it. But when you need it and have not thought about it before, it is probably already too late. I am talking about … Continue reading
removing outdated ssh fingerprints from known_hosts with sed or … ssh-keygen
At least from the last issue in Debian-based systems including Ubuntu you might know the pain of getting the message from you ssh client that the server host key has changed as ssh stores the fingerprint of ssh daemons it … Continue reading
Joining an Active Directory domain with Ubuntu
What a pain. Imagine you are in Windows network environment and have a small amount of Ubuntu desktops. You task is to let them join the Active Directory so users can login with their known credentials. There is a package … Continue reading
/usr/bin/test not /usr/bin/[ anymore?
I am really puzzled: While proudly presenting some linux knowledge I could not explain why /usr/bin/test and /usr/bin/[ are on Debian and Ubuntu (and maybe other distributions) not binary and symlink but different binaries. On Ubuntu Gutsy it looks like … Continue reading
The dilemma of ssh authorized_keys key files and its comments
Imagine the following situation: You care for live servers and work in a team of let’s say five, six or even more people. Access to the servers is granted through ssh. The people login either as root (yes, you should … Continue reading