KVM stands for Kernel-based Virtual Machine. As the name suggests, this is kernel based virtualization technology for Linux OS on hardware that supports virtualization. The guest operating systems can be fully virtualized or para virtualized. Para-virtualization enables several operating systems to run on one set of hardware by effectively using resources such as processors and [...]
Linux
CVE-2014-6271 is a high impact critical fix. If you are running a Linux system, you should fix this vulnerability. This CVE-2014-6271 (and CVE-2014-7169) vulnerability is also called as Shellshock. A flaw was found in the way Bash evaluated certain specially crafted environment variables. An attacker could use this flaw to override or bypass environment restrictions [...]
In a typical scenario, during the boot process, the run-level system startup scripts are executed one-by-one. A particular run level startup script will not execute until the previous script is executed completely. If a particular service during the startup is hanging for some reason, it might take a while before it times-out and move on [...]
Apart from the default route, you can also configure additional routes. For example, your server you might have 2 interfaces (eth0 and eth1). By default, all the traffic is routed through interface eth0 irrespective of what IP address you have configured on eth1. To route the incoming and outgoing traffic through eth1, other than the [...]
For Debian based systems like Ubuntu, you can use aptitude command for package management from the command line. This article explains several aptitude command examples including the following: Install a specific version of a package Install multiple packages using pattern Search for a package using pattern Get packages under a section Don’t update a specific [...]
insserv command is used to control the start and stop order of the services that are on a Linux system. It enables an installed system init script (boot script) by reading comment header of the init script and calculating the dependencies between all the scripts. Insserv scans for the system facilities in the configuration file [...]
Audacity is an open source software for manipulating audio. The following are few important features of audacity: Record live audio Playback recorded audio/sound files Edit sound files by cut, copy & paste. Convert audio from one format to another Apart from Linux you can also install Audacity on Windows and Mac OS X. This article [...]
HPACUCLI stands for HP Array Configuration Utility CLI. As the name suggests, this utility is for HP servers. Hpacucli is used to create, delete and repair the logical and physical drives on the smart array controllers in HP servers. To use hpacucli, download and install the latest version of hpacucli rpm from the HP website [...]
My name is Ramesh Natarajan. I will be posting instruction guides, how-to, troubleshooting tips and tricks on Linux, database, hardware, security and web. My focus is to write articles that will either teach you or help you resolve a problem. Read more about