In this article, we will look into the steps required to solve  "AH00558: httpd: Could not reliably determine the server's fully qualified domain name," error. the Recently I was working to bring up my Apache web server to host my PHP Applications on Port 443 but while bringing up the service I noticed "AH00558: httpd: ... Read more

In this tutorial, I will take you through 5 Best ways through which you can become root user or superuser in Linux. If you want to run any privilege command in your Linux Based Servers then you need to have root or superuser access. There are many commands on Linux System which cannot run through ... Read more

In this tutorial, i will take you through 10 Popular Kill Command Examples in Linux/Unix. kill command is a very popular command in Linux/Unix based Systems to terminate a process. kill command relies on list of signals to terminate any of the System processes(User Space Processes). By default kill command sends the TERM signal to ... Read more

In this article, I will take you through the steps to Install Java on Ubuntu 20.04. Java is a very popular Object Oriented Language. It is Known as Platform independent Language due to its ability to run in various hardware architecture platforms. You will see Java based Applications on almost all the digital platforms around ... Read more

In this article, I will explain you about the curl error: Failed Writing received data to disk/application on Linux and the steps to solve this error. This error could show due to various reasons. One of the common reason is the disk space utilization which happened with me. I will take you through the detail ... Read more

In this article, I will take you through 25 Best Crontab Command examples in Linux to Schedule Cron Jobs. You might have faced a scenario where you need to schedule a specific Job at certain day and at certain time in your Linux Servers to perform some specific task. This can be easily achieved by ... Read more

In this article, I will take you through the Steps to Install and Configure OpenLDAP Server on RHEL / CentOS 7. LDAP is known as Lightweight Directory Access Protocol which is generally used for Client Authentication to establish a session for running operations like search, read, write etc. LDAP Server are widely used in the ... Read more

Last night I was working on my systems then suddenly saw a lot of Nagios Alerts on Dashboard showing "Socket Timeout" error. Then I went to my Server from where I was getting the nagios alerts and then tried to check the nrpe service status. It seems nrpe was not running then I started troubleshooting ... Read more

In this article we will look into all the possible scenarios which can cause "nrpe.service: main process exited, code=exited, status=2/INVALIDARGUMENT" error and the solution to fix this error. You might have seen this error in a Server where you have installed nrpe client package. Basically Nagios connects the Servers through nrpe client package to gather ... Read more

In this article, i will take you through the best steps to install perl on Ubuntu 20.04. Perl (Practical Extraction and Reporting Language) is a very popular and powerful language for String Handling and String Processing. You will see the usage of Perl as web scripting language along with other web technologies and frameworks. It ... Read more