[Linux]: SSH Cannot switch to specific user with an Error “su: cannot set user id: Resource temporarily unavailable”
One of my colleague came with a problem that he was not able to login to a particular user account on a...
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Fix OpenSSL Vulnerabilities on CentOS, Debian, Ubuntu and RHEL! [1.0.1e-fips]
If you find your production machines using OpenSSL version 1.0.1, 1.0.0 and 0.9.8, then here’s a serious vulnerability reported on...How to solve erratic disk usage statistics from du (Linux command)
Recently on my Linux server box, one of the disk partition was full and had to delete 100’s of MB of...A Simple Guide to Install OpenStack Icehouse on CentOS – Two node Architecture
The word “OpenStack” is quite popular these days. You might have heard this word, even if you are not working in...OpenStack Icehouse Installation Errors and Solutions – CentOS
I have been trying to install OpenStack Icehouse on CentOS for almost a week (Since I’m doing this for the...List of Common Errors (and Solutions) while Installing and Configuring OpenStack Nova Service
In continuation to my previous articles on OpenStack Errors and Solutions for installation and configuration of KeyStone and Glance, today...List of Most Common Errors (and Solutions) While Installing OpenStack Image Service GLANCE
I was recently installing OpenStack Icehouse for one of my project by following the official documentation from openstack.org. During the installation of...How to Fix OpenStack’s Keystone Authentication Error – HTTP 500?
Here’s a question from one of our reader Praveen. Question: I’m installing Openstack on a CentOS machine by following the online documentation...Did you run ‘mysql_secure_installation’ after Installing MySQL? It helps Secure MySQL
The MySQL database package comes with an automated secure installation script called “mysql_secure_installation”. It’s advised to run this script soon...How to Install and Configure NTP for Time Synchronization in CentOS?
I was recently working on a Grid Computing project, where I had to install a grid middleware called Globus Toolkit....‘yum update’ Failed with an error message “Couldn’t resolve host’ on Centos – Here’s a Fix
One of our reader sent us the below question. Question: I have CentOS 4.9 installed on my PC and thought...Humane technology- Keepod is trying to bridge the gap named disparity.
When it comes to technology, city dwellers have always been spoilt for choice. Even the nooks and cranny of India...Install Android 4.3 in Oracle VirtualBox – Complete Guide with screenshots
Ever wanted to run Android on your desktop? Be it a Linux or Windows PC, you can now Android operating...[Linux]: How to Hash Known Hosts Files of ~/.ssh/ directory
During connecting to a SSH server, the client stores the few details like Server’s Hostname, IP Address and Host key...[Linux] : How to stop automated bot based SSH attacks ?
I’ve seen many a times in my LogWatch report about “Refused incoming connections” from a number of IP’s. These are may be...13 dig command examples to Dig through DNS records
Dig, the Domain Information Groper is one of the useful utility to lookup Domain Name System (DNS). The command helps...An Ultimate Guide to Upgrade Kernel on CentOS/RHEL/Fedora
Well, there are plenty of reasons why you should run latest version of Linux Kernel. For instance, the current kernel...How to allow or deny remote login to specific user accounts on Linux server
If an attacker gains root login to your system, he can do more damage than if he gains normal user...How to disable or drop Ping (ICMP) packets to your server? [Linux Basics]
One of our regular reader at Techglimpse, asked me this question. Question: How can i disable ping requests to my...10 Effective Mysqldump command Examples for your Reference
MySQL is one of the most widely used Database system, that comes with tons of effective command line utilities. For...