sharadchhetri

Linux, Open Source, Cloud & DevOps

Linux

Nagios monitoring on AWS Autoscaling group instances

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Setting Nagios monitoring alerts on instances behind the AWS Elastic Load Balancer (ELB) is always tricky part. In this post, we will learn how we can monitor the instances which are created by autoscaling policy and running behind the ELB. We expect our reader do have good knowledge on scripting, nagios and AWS comptuting. This […]

Postfix + SES : SASL authentication failed

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After configuring AWS SES service with Postfix, you may have found error in logs – SASL authentication failed . The error will not allow you to send email from server by using AWS SES service. Reasons For Error : SASL authentication failed 1. Incorrect Credential : (a) Many times the “SASL authentication failed” error happened […]

Send nagios report as pdf file via email

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The tutorial will give you idea, how you can send Nagios Report as pdf file via email. We will achieve this requirement, with the help of script and using wkhtmltopdf command line tool. We will set the Nagios Report script in crontab and send it via email to receiver person/team. In our previous post we […]

Convert website page to pdf and image

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To convert website page to pdf and image is very useful for various reasons. This kind of requirement you may have seen while making any report and we need to convert website page to pdf or image. Recently, we got requirement to create website page to pdf for some report. Actually the report was displaying […]

Python headers are required to build Mercurial but weren’t found

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While installing Readthedocs package inside Virtual Environement on Ubuntu 14.04 LTS , I found this error “Python headers are required to build Mercurial but weren’t found in /usr/include/python2.7/Python.h” . It seems the dependency issue with header files for python. So what should be fix for this issue. It is very simple, we have to installed […]

2 Methods to Install Ansible on Ubuntu, CentOS and RHEL

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Introduction In this post we will learn how to install Ansible on Ubuntu, CentOS and RHEL . In the world of IT automation tools, Ansible name is famous among system admins and developers. Ansible can be used in cloud provisioning, configuration management, application deployment, intra-service orchestration and other automation needs. Features of Ansible We tried […]