Tag Archives: System Administration

Linux performance Monitoring Tools

There are a lot of tools used for monitoring the performance in Linux. Here is the list of tools in one image that covers what is monitored by what.  

Posted in DevOps, Monitoring, OperatingSystem | Tagged , , | Leave a comment

Chef Issue – Recover deleted user pivotal

By default “pivotal” is the only chef server superuser who has permission to CREATE users,orgnization, group etc in chef server.  So if by mistake you will delete the “pivotal” user with below command : # chef-server-ctl user-delete pivotal Then , … Continue reading

Posted in Configurtion management, DevOps, HOWTO, TIPS & T RICS, TROUBLESHOOT, Uncategorized | Tagged , , | Leave a comment

Docker Private Registry Setup

We can create our own secure private  docker repository where we can store our images and can be accessed from remote machine.   1. Goto /var/lib/docker in server and Create certificate using the domain name: cd /var/lib/docker && mkdir certs … Continue reading

Posted in DevOps, HOWTO, Operations, TUTORIALS, Uncategorized | Tagged , , , , , , | Leave a comment

Using Docker – Part 1

In this part we will go through some simple usage of docker command. Use -D with docker for debug mode. Docker images are Immutable and Containers are Ephemeral. How to get help ?? docker help docker <command> help 1. Check … Continue reading

Posted in ARTICLES, Container, DevOps, HOWTO, Operations, TIPS & T RICS, TUTORIALS, Uncategorized | Tagged , , , , , , | Leave a comment

Docker Concept & Setup

Why Containerization ? Up to now we have been working with monolithic applications where different components of service are packaged into a single application which is easy to develop, test and deploy.But when it becomes large and complex it’s become difficult … Continue reading

Posted in ARTICLES, Concepts, Container, HOWTO, OperatingSystem, TIPS & T RICS, TROUBLESHOOT, Uncategorized | Tagged , , , , , , | Leave a comment

Puppet Quick Tutorial with examples

Puppet Version Used : 3.8 Distro Used : RHEL,CentOS, OEL 1. Puppet master : Get the repo with below link. rpm -ivh http://yum.puppetlabs.com/puppetlabs-release-el-6.noarch.rpm install the master yum install puppet-server Enter the master server hostname in the puppet.conf file under [main] … Continue reading

Posted in Uncategorized | Tagged , , , | Leave a comment