Ksplice: Upgrade / Patch Your Linux Kernel Without Reboots

Posted on in Categories Linux last updated November 9, 2016

Generally, all Linux distributions needs a scheduled reboot once to stay up to date with important kernel security updates. RHN (or other distro vendors) provides Linux kernel security updates. You can apply kernel updates using yum command or apt-get command line options. After each upgrade you need to reboot the server. Ksplice service allows you to skip reboot step and apply hotfixes to kernel without rebooting the server. In this post, I will cover a quick installation of Ksplice for RHEL 5.x and try to find out if service is worth every penny.

Linux: Display Japanese or Chinese Or Any Other Multilingual Text On The Console / Shell Prompt

Posted on in Categories CentOS, Debian Linux, GNU/Open source, Howto, kernel, Linux, Linux desktop, Linux distribution, News, RedHat/Fedora Linux, Sys admin last updated July 16, 2008

Explains how to display multilingual text such as hindi, chinese, japanese, korean etc text on the console using framebuffer, and bterm applications under Fedora / RHEL / CentOS / Debian / Ubuntu Linux.

How To: Double Linux disk read performance with readahead parameter

Posted on in Categories CentOS, Debian Linux, File system, Hardware, Howto, Linux, RedHat/Fedora Linux, Storage, Suse Linux, Tuning last updated November 22, 2007

The open source journal has published an interesting hack. It mostly applies to high-end, multiple-disk storage:

Under the right conditions (that is, with certain hardware configurations which I’ll identify later) it is possible to literally double your sequential read performance from disk. If you noticed the terrible performance of the 3Ware 9500S RAID controller and cared enough to investigate. It all has to do with a sneaky little block device parameter known as readahead. Without going into too much gory detail, readahead controls how much in advance the operating system reads when, well, reading, as its name implies. By default, some operating systems (in particular, RHEL5 Server) sets this to 256 (512-byte sectors), or about 128 KB. When dealing with large filesystems spanning many disks, this paltry figure can actually nuke your performance.

=> HowTo: Linux: Double your disk read performance in a single command

How to: Control Amarok Media Player with Bluetooth Enabled Phone

Posted on in Categories Howto, Kde, Linux, Linux desktop last updated September 5, 2007

This is a nice hack and a small how to about controlling Amarok media player:

Ever since I’ve received my new phone, bluetooth has excited me. To be honest, the notion of being able to control my pc from the phone was the exciting aspect. Ever wondered how to do this? Let me elaborate.

How to: Control Amarok Media Player with Bluetooth Enabled Phone
(Image Source: Authors blog)

=> Control Amarok with Bluetooth