Row hammer / rowhammer can open the way to the memory cells to leak their charges and interact electrically within them. Each bit of stored data occupies a separate memory cell that is electrically implemented with one capacitor and one transistor in DRAM - charged or discharged of a capacitor determines whether a DRAM cell stores binary value as 1 or 0. So it is happening at hardware level. … [Read more...]
Archives for September 2016
How to Upgrade Kernel of Ubuntu Server 16.04 (Cloud Server)
The latest kernel version any user is supposed to use in Ubuntu is updated automatically via the Update Manager, so no action is normally required by user regarding kernel upgrades. Server installations will default to the GA kernel and provide the enablement kernel as optional. We are referring to mainline kernel. Previously, we talked about how to upgrade live Ubuntu 14.04 to 16.04. Here is How … [Read more...]
Upgrade Ubuntu Server 14.04 to 16.04 With Live WordPress
As we wrote in previous articles, it is no more practical to keep Ubuntu 14.04 LTS running and trying to upgrade installed softwares somehow. We know that many webmaster are hesitant to upgrade for the fear of breaking website. Here Are the Detailed Steps on How To Upgrade Ubuntu Server 14.04 to 16.04 With Live WordPress With Kernel Upgrade, Debug & Fixes For Nginx. Indeed on Ubuntu 14.04 LTS, … [Read more...]
HTTP/2 : Checklist For CDN & PaaS Performance
Previously, we talked about the basic knowhow around HTTP/2 optimization. When Are Using CDN Service, CDN Terminates the Connection Geographically Closer to the User and Thus Increasing the Chance to Reduce the TCP and TLS Handshake Cost. Not All CDNs are Optimized For HTTPS & HTTP/2. After reading this brief guide on HTTP/2 Checklist For CDN & PaaS Performance, we expect that the reader … [Read more...]