Piyush Goel writer of 16 Mirror Image Books.
An article by Piyush Goyal. Lines which always motivate Dr. Piyush Goel. मैथिलीशरण गुप्त नर न निराश करो मन को नर न निराश करो मन को कुछ काम करो, कुछ...
Author: Aakanksha
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What is root and rootkit in Linux ?
For linux or Unix beginners, it is very difficult to understand what is meant by root in Linux or Unix and what rootkit refers to. In this post, we will...
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RHEL or Centos: What is umask in linux and how to set/change it ?
Today we will look: what is meant by umask in linux and how to set it to change default permissions for files and directories in Linux. For this article to...
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What are the different ways to get IP Address of our Linux system?
In this article, we will check how to grep the IP address of our system and netmask in a quick way. 1. Using “ip addr” command. This command also fetches...
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How to list all TCP ports in Linux ?
In this post, we will check how to list all TCP ports in Linux. Lets us quickly check the command and output: [root@nglinux ~]# cat /etc/services | grep -Po '^\w+.*\d{1,5}/tcp'...
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How to set domainname in RHEL 6 or CentOS 6 or NGE Linux 1.0 ?
In this post, we will check how to set/change domain name of our system in RHEL6 or CentOS6. NGE Linux 1.0 is based on CentOS 6, hence everything based on...
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Solved: service cman start failed: Redhat cluster
During redhat cluster configuration, when adding the nodes into cluster, sometimes it is failed with below error on the screen. service cman start failed To resolve this issue, try to...
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Solved: Stopping cgconfig service: cgclear failed with Device or resource busy : Linux cgroup
While restarting cgconfig service, many of the times we used to encounter “Device or resourse busy error” and the service restart gets failed. [root@nglinux ~]# service cgconfig restart Stopping cgconfig...
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Linux: What is : in bash and what is its impact of use ?
Today we will look what is : in bash shell in Linux or Unix and how to use it, and what is its impact if used. What is : (colon)...
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How to allocate system memory for test purpose in Linux ?
Suppose you want to test system behavior when memory usage reaches 90% or more. Hence you want a mechanism to increase the used system memory to this level. Now you...