1. Soft limit: is the value that the kernel enforces for the corresponding resource. 2. Hard limit: acts as a ceiling for the soft limit. [root@localhost ~]# cat /etc/security/limits.conf # /etc/security/limits.conf # #This file sets the resource limits for the users logged in via PAM. #It does not affect resource limits of the system services. … Continue reading How to set ulimit values

Note: install vagrant on your physical machine(laptop or desktop) mohammedrafi@NOC-RAFI:~$ mkdir phplearning mohammedrafi@NOC-RAFI:~$ cd phplearning/ mohammedrafi@NOC-RAFI:~/phplearning$ mohammedrafi@NOC-RAFI:~/phplearning$ vagrant --version Vagrant 1.8.1 mohammedrafi@NOC-RAFI:~/phplearning$ vim Vagrantfile VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.vm.box = "ubuntu/trusty32" config.vm.network "forwarded_port", guest: 80, host: 8080 config.vm.provision "shell", path: "provisioner.sh" end mohammedrafi@NOC-RAFI:~/phplearning$ vim provisioner.sh #!/bin/bash sudo apt-get install python-software-properties -y sudo C_ALL=en_US.UTF-8 … Continue reading learning php

It can be with Type or Description ICMP Message Types Description ICMP Message Types: ex: iptables -I INPUT -p icmp --icmp-type echo-request -s 1.2.3.4 -j ACCEPT Type:  ex: iptables -I INPUT -p icmp --icmp-type 8 -s 1.2.3.4 -j ACCEPT ICMP Message Types The type field identifies the type of the message sent by the host or gateway. Many of … Continue reading Allow icmp with specific Message Types

Installing PHP: PHP originally stood for Personal Home Page, but of late it is referred to as Hypertext Preprocessor. It is a server-side scripting language designed for web development. It is one of the core standing pillars for the LAMP (Linux, Apache, MySQL, and PHP) or LEMP (Linux, Nginx, MySQL, and PHP) stack. Please keep … Continue reading Installing PHP

Make sure you have already installed vagrant and virtual-box https://shaikmdrafi.wordpress.com/2017/01/13/vagrant/ mohammedrafi@NOC-RAFI:~$ mkdir practise && cd practise mohammedrafi@NOC-RAFI:~/practise$ mohammedrafi@NOC-RAFI:~/practise$ vim Vagrantfile VAGRANTFILE_API_VERSION = "2" $bootstrap=<<SCRIPT apt-get update apt-get -y install wget wget -qO- https://get.docker.com/ | sh gpasswd -a vagrant docker service docker restart SCRIPT Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.vm.box = "ubuntu/trusty64" config.vm.network "private_network", ip: "192.168.33.10" config.vm.provider "virtualbox" … Continue reading Managing Container in docker

Types of Modules Component Modules: Modules managing specific technologies. Profile Modules: Wrapper modules which used multiple component modules to create a technology stack. ex: creating app server module by using webserver and tomcat Role Module: Wrapper modules which uses multiple profiles to create complete system configuration. ex: create web-serve role with by using web-server host … Continue reading Types of Modules (roles & profiles) file structure in puppet

Managing Environment with r10k r10k is a code management tool that allows you to manage your environment configurations (such as production, testing, and development) in a source control repository. Based on the code in your control repo branches, r10k creates environments on your master and installs and updates the modules you want in each environment. … Continue reading Managing Puppet Environment with r10k

[root@www ~]# yum install gem -y [root@www ~]# gem install librarian-puppet --no-rdoc --no-ri Fetching: thor-0.20.0.gem (100%) Successfully installed thor-0.20.0 Fetching: librarianp-0.6.3.gem (100%) Successfully installed librarianp-0.6.3 Fetching: rsync-1.0.9.gem (100%) Successfully installed rsync-1.0.9 Fetching: multipart-post-2.0.0.gem (100%) Successfully installed multipart-post-2.0.0 Fetching: faraday-0.9.2.gem (100%) Successfully installed faraday-0.9.2 Fetching: faraday_middleware-0.10.1.gem (100%) Successfully installed faraday_middleware-0.10.1 Fetching: fast_gettext-1.1.0.gem (100%) Successfully installed fast_gettext-1.1.0 … Continue reading Installing and using librarian-puppet