Thursday, July 29, 2010

Things I love about Ubuntu 10.04 LTS Lucid Lynx

The things I Love and Hate about the new Ubuntu 10.0.4 Lucid Lynx.
  • GNOME 2.30
This is the final 2.x release before the major upgrade to 3. This will be the last time you will see the GNOME 2.X in Ubuntu flavor. For me it is fantastic. GNOME 3 will be a graceful successor to GNOME 2.x. In fact, I can promise that GNOME 3 will succeed where KDE 4 failed — in being a useful desktop upgrade right out of the starting gate.

  • HAL begone
Ubuntu 10.04 has done away with HAL (Hardware Abstraction Layer) during the boot process. This means that 10-second boot time has finally arrived. Hence the 10 second booting can be achieved in a charming way. The removal of HAL also drastically speeds up resume-from-suspend times for those of you in laptop land.

Friday, June 4, 2010

The system-config-firewall

secuThe firewall rules in the kernel can be configured by using iptables since 2.4 kernel. There are number of tools for configuring the firewall like command line tool, Shorewall, and a number of other GUIs. The default firewall configuration tool in Fedora systems is called “Firewall Configuration”, which can be accessed from Systemà Administration à Firewall in GNOME or from command line via, “system-config-firewall”.


This GUI allows you to set which services are allowed to be accessed via the Internet using a very simple interface. It defines a set of trusted services to be configured. To allow access, you simply need to check the box next to the entry. Each entry lists the service name, the port and protocol, and any additional iptables modules it uses. So if you wanted to allow Samba access to the system, you would check off the box next to the Samba and Samba Client service as in figure below.

The Oracle effect on Sun Microsystem VARs

The new policies introduced by Oracle in terms of “Oracle hardware support” for Sun servers are creating tensions among Sun VARs. The new policies from Oracle are “sinking” the customers as told by some VARs.

One Sun Microsystems systems integrator commented that it was getting pretty bad. The maintenance renewals and services are 3 times what they had in terms of price. Oracle also revoked the prepaid discounts and other flexibilities. Now Oracle charges 12% of the Sun hardware cost per year but in the past it depended on the hardware type and the multiplier was roughly 5% 0r 6%.

"Before this year, a customer buying a Sun 5240 server got three years of support for $3,800, including a discount for paying for the three years at once," this partner said. "That same box will now cost $7,699 to support for three years, a customer told.

Thursday, May 13, 2010

Landscape 1.5: Ubuntu Server Monitoring & Management Tool

Canonical has released its new server monitoring and management tool Landscape with its Ubuntu 10.04 LTS (Long Term Support) edition. The application is meant to make Ubuntu sever monitoring, management and package provisioning easy.

Ease of use is the main advantage of Ubuntu based distributions. However not much solutions were available to manage and monitor a group of Ubuntu servers simultaneously. Finally Canonical developed its own solution and that is “Landscape”. And with the release of their new distribution Ubuntu server 10.04 LTS Lucid Lynx, they have updated the older version to Landscape 1.5. The new version Landscape 1.5 is available as an on-site server and an online service from Canonical. Landscape is a simple and easy to use web based application that provides powerful automated system management capabilities such as management, monitoring and provisioning of packages across multiple machines, thereby lowering your per-systems cost of management and administration.

Tuesday, May 4, 2010

Ubuntu 10.04 LTS Server Edition Released

Canonical, on April 27 2010, announced the release of the Ubuntu 10.0.4 LTS server Edition release. This release includes extended security and maintenance updates free of charge to all users for five years. Ubuntu 10.04 LTS is the successor of the widely acclaimed Ubuntu 8.04 LTS. Ubuntu 10.04 LTS will be available for free download from Thursday 29 April.
   
Ubuntu 10.04 LTS will also spot a larger network of open-source and proprietary application providers certifying their applications on Ubuntu Server Edition than ever before. About 100 organizations have signaled their intent to certify applications on the platform, including Alfresco, Ingres, IBM, VMware, Zimbra, Yahoo! and many others with more expected to follow post-launch. Dell has announced its intention to support Ubuntu 10.04 LTS Server Edition and will offer Ubuntu Enterprise Cloud as an option on its PowerEdge-C product line - servers specifically designed for building cloud environments.

RedHat Enterprise Linux 6 Beta released.

Good news for all the RedHat enthusiasts: Red Hat Enterprise Edition 6 Beta has released. This beta release is the first step forward to the next major release of the Red Hat Enterprise Edition platform 6. Red Hat Enterprise Linux is expected to address the modern IT requirements and diminish the gap between virtual, physical and cloud computing. This first beta release of the RHEL 6 features updated core technology from the kernel to the application infrastructure to the development tool chain. RHEL 6 is going to meet the needs of the coming generations of hardware and software technologies.

The major themes of the release include pervasive virtualization, improved scalability and availability, increased power efficiency, and delivery of some of the latest software technologies. Now I will describe the highlights and noteworthy improvements in this RHEL 6 beta release.

  • Comprehensive power management capabilities:

RedHat Enterprise Linux 6 is more focused on power consumption by improving the 'Time-keeping' within the kernel. It helps to transit the processors which don't have active tasks to idle state frequently. The result is cooler CPUs and greater power savings. The new monitoring tools like 'powertop' and tuning tools like 'tuned' are also worth mentioning.

Tuesday, April 13, 2010

Set multiple IPs in single nic.

Hello guys...
Ever wondered how to set multiple IPs in a single network card? Here is the solution.

Multiple IP binded in a single network card allows you run different services in different IPs, for example you can run HTTP on one IP and SMTP on another IP or a private LAN using a local IP and the alias holding your Public IP. The major benifit here is that you do not need an additional physical adaptor, you can bind many virtual IPs to a single network card. Here I have explained the procedure for creating multiple IPs for RedHat based and Debian bases systems

Redhat based systems.

Let me assume that your NIC is bound with a static IP address. Go to the folder /etc/sysconfig/network-scripts/, there you will find your network configuration files.

# cd /etc/sysconfig/network-scripts/

Let me also guess that your machine has only one network card (can be onboard too!!!), then you will find a file ifcfg-eth0 in the folder. This file holds the IP information for the first nic. If your machine has more nics you will have ifcfg-eth1, ifcfg-eth2 and so on... Now open the ifcfg-eth0 file, you can view the network configuration as below:

# cat ./ifcfg-eth0# File: ifcfg-eth0


DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=192.168.1.120
NETMASK=255.255.255.0
BROADCAST=192.168.1.255
NETWORK=192.168.1.0
HWADDR=xx:xx:xx:xx:xx:xx


Now to bind another IP address to the same network card, you just have to copy the ifcfg-eth0 file to ifcfg-eth0:1.
 
# cp ./ifcfg-etho ./ifcfg-eth0:1