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Oracle database 11gR2 installation in RedHat 6.2 (32-bit)
In my earlier post I shoed you the steps to install Oracle database 10gR2 installation in RedHat 5.4 (64-bit).Now in this post I will guide with the steps and the pre-requisites required for the...
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device eth0 does not seem to be present, delaying initialization
This error is mostly observed due to changes in MAC address of the NIC card used in the Linux machine. For me it occurred when I cloned one of my Linux virtual machine. So the cloned machine was not...
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Creating an internal network using VMware Workstation
In this post I will show you simple steps required to create your own internal network infrastructure using vmware workstation. This can be useful in case you want to practice some networking stuff and...
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The TCP/IP connection to the host 127.0.0.1 , port 1433 has failed. Error:...
I was facing this error while trying to connect to my existing database during the upgrade of my vCenter Server from 5.0 to 5.1. So while trying to connect to my existing database during the...
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7 Commands to read or view the contents of a file using CLI in Linux
Let me show you 7 commands which can be used to view the contents of its file where each command has its own advantage and you can use them as per your requirement.1. less commandThis is most used and...
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Basic iptables tutorial in Linux I
For those who are not sure of the term iptables let me clarify you (From Wiki) iptables are the tables provided by the Linux kernel firewall (implemented as different Netfilter modules) and the chains...
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Basic iptables tutorial in Linux II
In my last post I had started a basic tutorial on iptables and implementing rules. Let me continue with more examples and available options with iptables.Creating user defined chainsNow by default as I...
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Opnefire installation guide in Linux (Red Hat)
Let me show you step by step installation guide for openfire in Red hat Linux 6.2 using Postgresql database.Make sure you have postgresql database and openfire rpm installed in your machineYou can get...
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no pg_hba.conf entry for host "localhost", user "myuser", database...
I got this error while trying to connect my postgresql database using openfire server.Error:FATAL: no pg_hba.conf entry for host "10.10.20.26", user "deepak", database "openfire", SSL offSolution:You...
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Check that the hostname and port are correct and that the postmaster is...
I was getting this error while trying to connect my openfire server with postgresql database. Well letme show you the step to fix this error.Error:Connection refused. Check that the hostname and port...
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could not open default font 'fixed'
This error pops up while trying to start vncserver services which happened to me in CentOS 6.2While it is very frustrating when you are in a hurry and these small error starts giving you a headache in...
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usr/bin/Xvnc: undefined symbol: pixman_composite_trapezoids
This is one another error which appears while trying to restart vncserver services which came to me inCentOS 6.2.Error:/usr/bin/Xvnc: symbol lookup error: /usr/bin/Xvnc: undefined symbol:...
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iptables rules for Samba 4 in Red Hat Linux
In my earlier articles I had explained step by step guide for the configuration for Samba 4 and Samba4.1 on Red Hat Linux OS. The links for the same can be found at the bottom of this page.But in those...
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How to install openfiler
Before starting installation steps I would like to give a brief intro onWhat is Openfiler?Openfiler is an operating system that provides file-based network-attached storage and block-based storage area...
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Configuring iSCSI storage using openfiler
In my last post I had shown you the steps to install openfiler. Now let me show you the steps required to configure an iSCSI storage using openfiler.Assuming that you have already installed openfiler...
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Configuration maximum comparison for VMware vSphere 5.0, 5.1 and 5.5
Here I have summarized the comparison with a list of selected features between vSphere ESXi 5.0, 5.1 and 5.5. I have skipped some of the features for detailed overview on all the comparison factors...
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How to configure network in Red Hat Linux
Configuring network in Red Hat Linux can be hectic and confusing if you don't know the parameter details which are used. Also from Red Hat 6 the configuration parameter has been changed for...
View ArticleHow to mount Windows share on Linux
Most of us know that we use Samba to share our Linux file system and it can also be accessed under Windows very easily with no much mathematic calculation. But to mount a Windows share on Linux becomes...
View ArticleWhat is . and .. in Unix/Linux ?
So, if you are reading this blog then you are confused with the fact that each of the directory in your linux/unix box contains a"." and ".." , what does this basically means?Well the answer is really...
View ArticleWhat is the plus (+) sign in permission in Linux ?
So do you see a plus sign in the permission section in any of your directory.No need to get confused, well it just means that the directory has extra acl permission. We use acl to give individual...
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