Existing lock /var/run/yum.pid: another copy is running
This is a very common error which you might come across in Red Hat Linux distro while trying to run yum command **Error:** # yum install bind Loaded plugins: fastestmirror,
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How to configure a caching only bind DNS server in Red Hat Linux
caching-only nameserver won't allow references to internal clients by hostname, but it does allow clients to take advantage of frequently requested domains that are cached. **Pre-requisites** Make sure all the
Iptables rules to allow/block ssh incoming/outgoing connection in Linux
[](http://3.bp.blogspot.com/-a_nd9m3kyys/UleMDD1UhSI/AAAAAAAACdQ/kAuN1C3jSUU/s1600/download.jpg) Let me show you some iptable rules which can be used to allow or block ssh connection from a specific host or network **Block 192.168.1.10 from connecting your localhost
Iptables rules to block/allow icmp ping request in Linux
[](http://3.bp.blogspot.com/-a_nd9m3kyys/UleMDD1UhSI/AAAAAAAACdQ/kAuN1C3jSUU/s1600/download.jpg) In this article I will show you different ways to block or allow incoming and outgoing icmp ping request in your Linux server. **Block ICMP ping request from all
How to configure Private Network in VMware Workstation
It is crucial to know your IP address, as most of the people want to check for security reasons, while others want to build backlinks. Even some of them look
10 examples to help you understand top command usage in Unix/Linux
Follow below link to get a step by step illustration to permanently add or remove extra columns to top command ouput with examples [How to reduce and/or add more columns
Fix "error while loading shared libraries *:No such file or directory"
It happens many time when you are trying to execute some command an error pops out like the one shown below error while loading shared libraries: libacl.so: cannot open shared
Script to take backup of any critical directory in Unix/Linux
This is a script which can be used to backup of your home directory on a day basis where a compressed backup of your home directory **/home** will be saved
Configure Red Hat Cluster using VMware, Quorum Disk, GFS2, Openfiler
In this article I will be showing you step by step guide to install and configure **[Red Hat Cluster]** using **VMware Workstation 10**. You must be familiar with [**High Availability
Tutorial for Monitoring Tools SAR and KSAR with examples in Linux
In my last article I have explained about [Understanding Load Average]({{< relref "understanding-load-average-in-linux-and/index.md" >}}) and monitoring network bandwidth using iperf and [netperf]({{< relref "how-to-monitor-network-bandwidth-in/index.md" >}}). **sar** is a short term abbreviation for **S**ystem **A**ctivity **R**eport. ####