1. Why LVM is required ? LVM stands for Logical Volume Manager , to resize filesystem’s size online we required LVM partition in Linux. Size of LVM partition can be extended and reduced using the lvextend & lvreduce commands respectively. 2. Is it possible to [Read More]

Linux Server Tips

1. Proxy Server and its use. A proxy server is a computer server which gives the client system an indirect access to spme other network or service. A client connects to the proxy and requests connection, file, services available on a different server. The proxy [Read More]

Redhat Linux Security Tips

New Features and Options of Firewalld ===================================== As All you know that Centos/Redhat 7 is Using by Default Service as Firewalld instead of Iptables. Now To Block all incoming and Outgoing Connection from your server ----------------------------------------------------------------- 1. Check your Firewalld Service ================================ [root@desktop87 ~]# systemctl [Read More]

Linux Important Facts

1. What is Linux Kernel? Linux Kernel is a low-level systems software whose main role is to manage hardware resources for the user  and to provide an interface for user-level interaction. 2. What is BASH? BASH is short for Bourne Again SHell. It was written [Read More]


1.1. CLUSTER SOFTWARE INSTALLATION 1.2. CLUSTER CREATION 1.3. FENCING CONFIGURATION This chapter describes the procedure for creating a Red Hat High Availability two-node cluster using pcs. After you have created a cluster, you can configure the resources and resource groups that you require. Configuring the [Read More]

LVM Thing Provision

The concept of LVM Thin Provision is to create a new size of POOL other than Volume Group (VG) from where you can create very much larger size of Logical volume partition. Here are few simple steps are given ============================ We can assume that we [Read More]

How to use vmstat command in linux

vmstat (virtual memory statistic) which is generally used for system monitoring purpose [root@puppetmaster ~]# vmstat procs ———–memory———- —swap– —–io—- –system– —–cpu—– r b swpd free buff cache si so bi bo in cs us sy id wa st 0 0 0 265492 29852 355740 0 [Read More]