In this post we will know about how to find date of expiry and issue of SSL certificate with command line. As a system administrator it is good to know how can we get the ssl certificate information with command line. It helps you to make script and run from terminal/cron job etc. We have…
In this post we will quickly share the commands, which will help to find linux operating system architecture installed on system. Most of the time system admin or linux user requires to know which Linux OS architecture is installed. Mostly , while installing or developing the package or software we need this information. Whereas it…
Recently we have migrated to shiny CentOS 7 saying good bye to CentOS 6. Although the migration of WordPress was quite easy from CentOS 6 to CentOS 7. This time, we made plan to try another technology stacks. Leaving some good memories with my old server, invested lots of time to tune the server with…
This post explain, how to configure Nginx web server for Static Website. At the current time, Jekyll,Octopress, pelican are very popular static site generator. Generally for static website we use html files.
We have created a Nagios plugin called check_ssl_cert_expiry . The nagios plugin will send the alert (warning/critical) before SSL Certificate expiry date. We have tested this plugin to check HTTPS website URL. It is working very well. Why we require check_ssl_cert_expiry nagios plugin To know how many days are left before date of expiration of…
The tutorial explains about how to change the telnet server port number on CentOS 7 / RHEL . We will keep SELINUX in enforcing mode and change the default port number 23 to some other port number. We believe you have already install telnet server on CentOS 7 / RHEL 7. Task : Change telnet…
The tutorial explains about how to install telnet server on CentOS 7 / RHEL 7 . We will also keep SELINUX on enforcing mode and use the firewalld rules. About Telnet Telnet is a network protocol used on the Internet or local area networks to provide a bidirectional interactive text-oriented communication facility using a virtual…
In this tutorial we will learn how to create new swap file on CentOS 7 / RHEL 7. Generally on Cloud Servers ( AWS/ DigitalOcean) or VPS, swap space is not created by default. This requirement we can achieve within a few steps. Prerequisites Must have free space on mounted disk. You can check by…
This tutorial will help you to setup htpasswd on Wordpress wp-admin running on Nginx server. For security point of view it is important to protect the wp-admin of Wordpress. When any user hit your Wordpress blog URL with /wp-admin , it will get the wordpress Admin dashboard to login.
Recently we got the system which has MySQL server version 5.1 was running. It was good chance for me to reproduce the issue and show practical answer on question asked on stackoverflow. Operating System: CentOS 6.5Arch : x86_54 Symptom MySQL service failed to start after upgrading from MySQL 5.1 to 5.6 version. Given below is…
While configuring the Nginx we encountered the error – “could not build the server_names_hash, you should increase server_names_hash_bucket_size “. In server the Nginx service were failing to restart
Recently I created a new nagios plugin which check the no. of instances attached in ELB (Elastic Load Balancer) . Here we are talking about ELB in AWS (Amazon Web Service) Cloud. Elastic Load Balancing automatically distributes incoming application traffic across multiple Amazon EC2 instances in the cloud. Details of check_ELBinstance nagios plugin Requirement :…
FAQ : How to connect to Ubuntu Desktop / Server by using ssh. I just installed Ubuntu 14.04 LTS Desktop edition and have not found ssh service running in system. Answer : OpenSSH is a FREE version of the SSH connectivity tools. It provides the encrypted communication between computers by using ssh protocol. History of…
The post will explain, how to install MariaDB Server 10.0 on Ubuntu 14.04 LTS (Trusty Tahr) . MariaDB which is now a days very popular. It is fork of MySQL and best alternate of MySQL. Red Hat has already announced the MariaDB as default Database in Verion RHEL 7.0. I surely suggest you to know…
This time we need to redirect the output to a file where user needs sudo privileges. The tutorial explains, how to redirect sudo output to a file in easy way. We will share some examples, which help you to redirect the output into a file where sudo command is required. In case you are trying…