CVE-2016-5195: Linux kernel local privilege escalation vulnerability Dirty COW

A very serious security problem has been found in the Linux kernel, it’s a 0-day local privilege escalation vulnerability, which has existed for eleven years since 2005 ( since Linux kernel version 2.6.22+ ). This bug affects all sort of of Android or Linux kernel to escalate privileges. Any users can become root in seconds.
Continue reading…

 

The CGroup Subsystems in Red Hat Linux

Control groups (a.k.a. cgroups) allow you to allocate resources — such as CPU time, system memory, network bandwidth, or combinations of these resources — among user-defined groups of tasks (processes) running on a system. You can monitor the cgroups you configure, deny cgroups access to certain resources, and even reconfigure your cgroups dynamically on a running system.
Continue reading…

 

Ubuntu 9.10 Desktop Edition Released

This new release comes with GIMP 2.6, GNOME 2.28/KDE 4.3.2, Mozilla Firefox 3.5, OpenOffice.org 3.1, Linux kernel 2.6.31, X.Org 7.5, and the Empathy Instant Messenger instead of Pidgin. The Ubuntu One client, which interfaces with Canonical’s new online storage system, is installed by default. It also debuts a new application called the Ubuntu Software Center […]
Continue reading…

 

Create additional loop devices in Linux

In Unix-like operating systems, Loop device is a pseudo-device that makes a file accessible as a block device. When you mount a file as partition, it would use one loopback device. I faced a loop device related issue this morning, that’s why I create this article to share some ways to bypass limitation of the […]
Continue reading…

 

Expedition Inside the Linux File Systems

Here’s a good document on file system analysis. As mentioned from this document: The aptly named UNIX Filesystems: Evolution, Design, and Implementation is only giving a general overview of how things work. Practical File System Design with the Be File System by Dominic Giampaolo is an an enjoyable read but, as the name indicates, it […]
Continue reading…

 

OpenVZ On CentOS 5.4 installation and configuration

This article will describe how to create OpenVZ container in CentOS 5.4. With OpenVZ you can create multiple Virtual Private Servers (VPS) on same hardware machine and running them simultaneously and efficiently. OpenVZ is the open-source branch of Virtuozzo, a commercial virtualization solution widely used by hosting providers. The OpenVZ kernel patch is licensed under […]
Continue reading…