BBR (Bottleneck Bandwidth and RTT) congestion control algorizthm is a new congestion control algorithm which is contributed to the Linux kernel TCP stack by Google.

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…

Have you ever been complained that servers are getting slower and slower, and with the command free, you see that a bit of swap is used and wondering what processes are swapping ?

Red Hat on Wednesday (10, Nov. 2010) released version 6 of its Red Hat Enterprise Linux (RHEL) distribution. RHEL 6 has more than 2,000 packages, and an 85 percent increase in the amount of code from the previous version, said…

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,…

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,…

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…

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…

This article is a step by step guide for tuning and optimizing Red Hat Enterprise Linux on x86 and x86-64 platforms running Oracle 9i (32bit/64bit) and Oracle 10g (32bit/64bit) standalone and RAC databases. This guide covers Red Hat Enterprise Linux…