Attach ISO image stored in XenServer local storage

Citrix XenServer is powerful hypervisor that is based on Linux (Redhat/Centos/Fedora family) and competes with Vmware ESXi and offer wide range of virtualization features for data centers. In general you can do a bare-metal installation of XenServer to your hardware server and create multiple virtual machines (VMs) inside XenServer host. Obviously you’ll need to have the possibility to boot VM from DVD-Rom to start installation of, let’s say, Linux Mint. You […]

Read more →

 

Linux Mint Debian Update Pack 4 is out

The latest update of Linux Mint Debian has been rolled out today. Update pack 4 is applicable for all LMDE users and includes the following updates: Gnome 2 has been upgraded to Gnome Shell, kernel is now 3.2 version, Cinamon and Mate desktops are now available out of the box. In order to upgrade just use Update Manager that comes with Linux Mint Debian by default, you will see an […]

Read more →

 

Track Cisco BGP peers using Nagios

Few will deny that monitoring of Cisco devices is essential part of sysadmin’s job. I personally use Nagios to track states of BGP neighbors on Cisco routers so if one of peers goes down I’ll receive a phone call from Nagios. You may have redundant network topology but it still makes sense to know when peer goes offline, how often it happens and how fast failover router (if any) pick-ups […]

Read more →

 

Top 5 Linux Monitoring Tools. Web Based.

Linux system monitoring is one of the most important tasks for every sysadmin: it is crucial to know everything about system including CPU load, network traffic statistics, memory consumption, logged in users, availability of disk free space or service. And it’s inevitable that something breaks or goes down from time to time so usually it’s just better to know it happened from Linux monitoring system’s alert rather than from angry […]

Read more →

 

PostgreSQL to File

PostgreSQL (or simply Postgres) is powerful and extremely popular database management system. It comes with easy to use tool that makes it possible to export output of any query into text file. If you are familiar with Mysql you may know about SELECT … INTO OUTFILE syntax already so here is its equivalent to output PostgreSQL to file: 1. Connect to PostgreSQL DBA: $ psql -U postgres -p 5432 databasename […]

Read more →