How to Obtain Diagnostic Information for VMware ESXi 5.0 hosts using the vSphere Client

When you lodged a support request to VMware Technical Support, they routinely requests the diagnostic information from you. This diagnostic information contains product specific logs and configuration files from the host on which the product is run or from the host that may have issues and need further troubleshooting. This information is gathered using a […]

How to Restore and Recover Lost Bookmark on Mozilla Firefox

During normal usage of Firefox, you may discover that your Mozilla firefox has suddenly lost your bookmarks. In most cases, the bookmarks are not lost. Losing your bookmark just like you lost all your best friend contacts number. There are a number of reasons that can cause your bookmarks to disappear or suddenly lost from […]

How to Check MX Record Using nslookup Command on Windows

nslookup is a command-line tool for network administrator and system administrator that available in many computer operating systems such as linux and windows for querying the Domain Name System (DNS). nslookup can obtain domain name or IP address or for any other specific DNS record. In this post, i will share how nslookup command will […]

How to Fix “Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again” Error When using Local DVD-ROM/CD-ROM Yum Repository on Fedora 16

Fedora 18

Question : I am using Local DVD-ROM/CD-ROM yum Repository on Fedora 16. But when i perform any yum command to install or update or remove the package/module, i get the following error : Error: Cannot retrieve repository metadata (repomd.xml) for repository: fedora. Please verify its path and try again Answer : To fix the following […]

How to Extract ZIP files on Linux

ZIP archives are most commonly used in Windows/MS-DOS based environments. In Linux, you can use the “unzip” command to extract,list or test ZIP files. Simply run the following command to unzip the files : [root@centos62 ~]# unzip adminer-3.3.3.zip -bash: unzip: command not found If zip command is not installed, proceed to install using this command […]

How to Unblock and Reclassify a Website That Trend Micro Blocked ?

Symptoms : I am running Trend Micro OfficeScan and while trying to access a website. Unfortunately one of my site has been blocked by Trend Micro and return the following error message : URL Blocked The URL that you are attempting to access is a potential security risk. Trend Micro OfficeScan has blocked this URL […]

How to Install telnet on CentOS

Question : When i try to perform the troubleshooting using telnet command, the following error appeared. How to fix this ? [root@centos62 ~]# telnet localhost 25 -bash: telnet: command not found Answer : Simply install telnet using this command : [root@centos62 ~]# yum install telnet Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * […]

How to Fix “content was blocked because it was not signed by a valid security certificate” on Internet Explorer

Symptom :Certificate error Web page is displayed when you try to visit an SSL Web site by using Internet Explorer 7, Internet Explorer 8 on Windows XP, Windows Vista and Windows 7 operating system. content was blocked because it was not signed by a valid security certificate Solution 1: 1. To clear the certificate error […]

How to install Red Hat Enterprise Linux 6 (RHEL) Server

In this post, i will share with you on how to install Red Hat Enterprise Linux 6 (RHEL) Server. Recommended partitions scheme for x86, AMD64, and Intel 64 systems are as follow: A swap partition A /boot partition A / partition 1. Select Install or upgrade an existing system option on Grub Menu 2. Skip […]