Most of the  production servers  has limited connectivity to the Internet. If they have any connectivity then probably it  will be through a forward proxy server. If your server is behind the proxy server, then you need to provide proxy server details in /etc/yum.conf.. The proxy setting must specify the proxy server as a complete [...]

While you publish your Schema or Orchestration as a Webservis, You may have routing exception which is one of the many other exceptions most probably you will have A message received by adapter “SOAP” on receive location “WebService_WSUpload/WSUpload” with URI “/WSUpload/WSUpload.asmx” is suspended. Some problems that can cause this problem: The destination orchestration or send [...]

With every new kernel update, you receive another boot loader menu item. It will also eat up space from your /boot partition. If you don’t want your /boot partition to be filled up, then you need to remove some of the old kernels. How do we do it? First let’s get the list of kernels [...]

I have found very nice classification of http status codes. It helps you get an quick overview of status codes. Category Error Code 2xx: Successful 200 OK 3xx: Redirection 301 Moved permanently 302 Found, look elsewhere (Moved temporarily) 4xx: Client Errors 403 Forbidden 404 Not Found 5xx: Server Errors 500 Internal Server Error

If you use date command without any parameter, it will print the current date and time. [root@centos ~]# date Thu Jan 7 18:33:48 CET 2010 You can use the same command to set/change your system date and time. Notation for this usage as listed below. date MMDDhhmmYYYYY Let’s say that we would like to set [...]

Any server you put on the Internet will be subject automated and targeted attacks. If you look at your auth.log file you would see that your servers are constantly scanned and attacked. %99 of the attacks are automated and targeting standard ssh port (22). Try this command on your server. You can change the date [...]

VMWare has a yum repository for vmware tools related rpms. Before we do the vmware tools installation we need to define this repository on our server. Let’s start with importing the public key for the vmware packages. rpm –import http://packages.vmware.com/tools/VMWARE-PACKAGING-GPG-KEY.pub Now it is time to create a .repo file for our repositoy. This file needs [...]

Timezone information for your system is defined in the /etc/localtime file. By changing this file you can change time zone for your server. You don’t need to modify this file manually. /usr/share/zoneinfo/ folder contains time zone files you would need. Let’s say that we want set the time zone for our server to Europe/Amsterdam. Then [...]

Responding to a ping request can not be the part of job definition for a production/critical server. For critical systems It is better not to publish information more than it is absolutely necessary. Disabling response to ICMP ECHO requests is a measure we can easily implement. news

Gathering information about your machine can be cumbersome. Linux has several tools for requesting this information.dmidecode is one of the handy tools that you can use. dmidecode is a tool for dumping a computer’s DMI (SMBIOS) table content in a human-readable format. Below you can see the first part of command output. alis@advance17:/opt/iso$ sudo dmidecode [...]