In this post,I am sharing the troubleshooting steps for cron job problem. You may have seen many times, the cron job stopped working suddenly or not working on first instance. As a Linux System Engineer,I also faced this problem many times.The reasons are many and we are sharing few them which generally occurs. What is […]
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Bash : print variable value inside single and double quotes
In this post we will learn, how to print variable value inside single and double quotes. Today I was working on some bash scripting and got this requirement. The script is working wonderfully and as expecting output was also coming. Today we will share this basic bash scripting. Explaining step by step , which gives […]
CentOS 7 / RHEL 7 : Reset / Recover forgotten root password
In this post we will learn, how to reset / recover forgotten root password on CentOS 7 / RHEL 7 (Red Hat Enterprise Linux 7). On RHEL 5/6 or CentOS 5/6 series , the method of resetting forgotten root password was same. In latest RHEL 7 / CentOS 7 this time we have found some difference in steps to reset the forgotten root password.
Unable to complete install:’unsupported configuration hda-duplex not supported in this Qemu binary’
While creating first virtual machine in KVM on Ubuntu 14.04 got Error : Unable to complete install:’unsupported configuration hda-duplex not supported in this Qemu binary’. Note: It was my fresh installation of KVM on Ubuntu 14.04 LTS. Solution : Restart libvirt-bin. sudo stop libvirt-bin sudo start libvirt-bin Reopen the virt-manager. I hope the problem is […]
Install KVM on Ubuntu 14.04 LTS Desktop
KVM ( Kernel-based Virtual Machine ) is virtualisation software which is used for creating virtual machines on host system. In this post, we will share installation method of KVM on Ubuntu 14.04 LTS. We also include brief introduction of problem we have faced during installation and its solution we will also share. We recommend you […]
Install VirtualBox Guest Additions and create videos
In this article we will learn how to install VirtualBix Guest Additions and create videos in VirtualBox.
How to install Redis server on CentOS 7 / RHEL 7
Introduction In this tutorial we will learn, how to install Redis server on CentOS 7 / RHEL 7 . The abbreviation of Redis is “Remote Dictionary Server”. It is one the of the most popular open source, advanced key-value cache and store. Project Website: Redis Install Redis Server Follow the given below steps to install […]
Install MariaDB Server 10 on CentOS 7 and RHEL 7 by using yum
In this post we will how to install MariaDB Server 10.4.7 version on CentOS 7 and RHEL 7 (Red Hat Enterprise Linux 7 ) by using yum command. We are doing fresh installation of MariaDB Server on minimal installed CentOS 7 version. The method is applicable to RHEL 7 as well. While installing MariaDB 10 […]
ss command : alternate of netstat
In case you are looking for alternate of netstat command, here is called ss command. By default ss command is shipped with package called iproute (Advanced IP routing and network device configuration tools) Introduction of ss ss command is another utility to investigate sockets. It is used to dump socket statistics. It allows showing information […]
netstat command not found on CentOS 7 and RHEL 7 (Red Hat Enterprise Linux 7)
We have observed many new changes on Red Hat Enterprise Linux and CentOS 7 . With the previous RHEL and CentOS version, netstat command was available even in minimal installation. On CentOS 7 and RHEL 7, on doing minimal installation we have not found netstat command. To get the netstat command on RHEL 7 and […]
How to set hostname and FQDN on CentOS 7 and RHEL 7
The tutorial will explain about how to set hostname and FQDN on CentOS 7 and RHEL 7 (Red Hat Enterprise Linux 7). In our previous post “How to change hostname on CentOS and Red Hat“, we have already define the difference between hostname and FQDN. Hence suggest to read this post. In Red Hat Enterprise […]
Bash Code Injection Vulnerability via Specially Crafted Environment Variables
Bash Code Injection Vulnerability via Specially Crafted Environment Variables (CVE-2014-6271 (aka Shellshock ), CVE-2014-7169). This is one the most vulnerable bug we have seen in Linux at current time. Due to this bug, we are seeing lots of business impact in entire world. Details of CVE-2014-6271 A flaw was found in the way Bash evaluated […]
Ubuntu Linux : get matrix effect on terminal
This time I made a thought to share something interesting.It is not related to system admin but it is just for fun. I generally use ubuntu most of the time for my desktop purposes. Hope you will like this matrix effect on your terminal. First you have to install cmatrix package into your system. It […]
Install EPEL repo on CentOS 7 and RHEL 7
In this post we will learn how to install EPEL repo on CentOS 7 and RHEL 7. On our previous post of “How to install EPEL repo in CentOS/Scientific Linux/Red Hat” , we have already written about EPEL repo. Extra Packages for Enterprise Linux (or EPEL) is a Fedora Special Interest Group that creates, maintains, […]
Linux : clear command and its keyboard shortcut
Today, in this post we will explain about linux clear command and its keyboard shortcut. Like cls command on Windows, on linux we use clear command.clear command is available on all Unix like Operating System. clear command clears output and command on console or terminal window. In short words, clear command clear the screen. But […]