Krypter med DanIDs “Digital Signatur” i Evolution
Er du bruger af Evolution og har behov for at sende en krypteret mail med DanIDs "Digital Signatur", skal du først have fat i kontaktpersonens certifikat. Dette finder du på DanIDs Certificeringscenter, såfremt personen har valgt at være listet her. Når du har fundet det rette certifikat klikke du på 
, hvorefter du kan gemme en .cer fil.
I Evolution vælger du Rediger -> Indstillinger (eller Shift-Ctrl-S) -> Certifikater -> Kontaktpersoners certifikater -> Importer hvorefter du får mulighed for at importere den hentede .cer fil.
Du skal naturligvis have din egen private signaturfil i Evolution.
Re-install / upgrade to Ubuntu 9.10 and keep encrypted data from previous version
When Ubuntu first started with encrypted hard drive support, I made a LVM system inside the encrypted system. I do not like to upgrade Ubuntu from one version to another, and I do not want to copy all my data for each installation. My LVM system therefore have root, swap and home, so that home can survive the re-installation.
Unfortunately, the installer (the alternative one) do not recognise the encrypted hard drive, and is therefore not able to use it. This little guide helps you to reuse your LVM layout - and your data!
NB: Use this guide at your own risk!
OpenWrt – tips & tricks
Change SSH port from 22 to e.g. 2222
Change the last line of the file /etc/init.d/S50dropbear to:
/usr/sbin/dropbear -p 2222