How to downgrade firmware on HP OfficeJet Pro 8610 to allow using old or refilled cartridges – UPDATE (HP official fw fix)

UPDATE 13.10.2016: HP finally surrendered after massive complaints of customers and released official firmware updates disabling the blocking mechanism for older and non-genuine cartridges. For more information and link to official firmware fix click here. Direct link to official 8610 firmware is here. The following article is kept for reference as it was the only way how to solve the issue with non-working OfficeJet printers for about one month after the blocking mechanism previously built to HP firmwares was triggered by the right date.

hp_cartdidge_orig_neorigPrinter manufacturers really want you to buy their genuine, overprices ink cartridges and toners. Even though US Magnuson-Moss Warranty Act and European rules on fair competition make it clear that printer manufacturers must not block using non-original inks and toners, and even warranty must not be void just by the mere fact of using non-original material, It’s becoming increasingly difficult to use alternative print material. For HP OfficeJet Pro 8610, some automatic firmware upgrade caused that many older and non-original or refilled cartridges stopped working, being marked as damaged. Some Brazilian folks posted a video on Youtube with a guide how to downgrade the firmware, and most important, published a link with the particular firmware version that makes the printer recognize the cartridges as valid! This is an English version of the manual how to do it:

Pokračování textu How to downgrade firmware on HP OfficeJet Pro 8610 to allow using old or refilled cartridges – UPDATE (HP official fw fix)

Jak šifrovat a zálohovat data na počítači (Windows, Linux, Mac)

Říká se, že dat, které si nezálohujete, si neceníte, takže je jedno, pokud se ztratí. 2-5 % klasických disků během 2-3 let selže, některé série SSD občas taky postihne náhlá smrt, a to nemluvím o situaci, kdy vám někdo notebook ukradne, nebo spadne na zem, polijete ho kafem či pivem apod. V tomto článku chci v rychlosti ukázat způsoby, jak na Windows, Linux a Macu zajistit zálohování. A jelikož všichni dnes máme notebooky, co taháme všude možně, v nich jsou uložená hesla a pravděpodobně osobní a citlivá data naše i druhých lidí, měli bychom vážně uvažovat i o šifrování.

Pokračování textu Jak šifrovat a zálohovat data na počítači (Windows, Linux, Mac)

ownCloud database hacking: How to revert unsharing of folder shared to a group

owncloudownCloud is a very nice tool for syncing and sharing files and folders in a workgroup or even company, basically it’s an open source replacement for Dropbox or Google Drive that runs on your own infrastructure.

A problem that may occur is when user Alice shares a folder „SHARED“ to a group „everybody“ (all the other users are members of this group).

Then user Bob clicks on the Recycle bin icon to „Unshare“ this folder for him/herself (he opts-out of this group-share even if he continues to be member of group „everybody“). Bob does not see this folder anymore but all the others do. Bob has no way of ever reverting this action and cannot opt-in again.

Pokračování textu ownCloud database hacking: How to revert unsharing of folder shared to a group