Puppet Cheat Sheet – Manifest Cook Book
Basic Puppet Template RESOURCE_TITLE { 'TITLE': ATTRIBUTE => VALUE, } File Attribute Ensure a file has specified content file { '/tmp/hello.txt': ensure => file, owner => 'nikko', grou... Read More
Upgrade MySQL 5.6 to MySQL 5.7 – CentOS
1. Create a backup of the original MySQL data cp /var/lib/mysql /var/lib/mysql.original 2. Download the MySQL 5.7 RPM wget http://repo.mysql.com/mysql57-community-release-el7.rpm -P /tmp/ 3. Remove th... Read More
Install MySQL 5.6 – CentOS
1. Verify the hostname on your server is set correctly Set Hostname 2. Download the MySQL RPM wget http://repo.mysql.com/mysql-community-release-el7-5.noarch.rpm -P /tmp/ 3. Enable to RPM rpm -ivh /tm... Read More
Increase the Open File Limit – CentOS
1. Check the current open file limit ulimit -n 2. Increase the open file limit temporarily unlimit -n 20000 3. Increase the open file limit permanently vim /etc/security/limits.conf Add: * - nofile 20... Read More
Nginx – Install an SSL Certificate
*** This guide assumes you already have your CSR and SSL certificate. Instructions to generate both will be added at a later time. 1. Make a backup of your configuration file cp /etc/nginx/conf.d/linu... Read More
Nginx – Add a domain – Centos 7
1. Create a new directory for the domain mkdir /usr/share/nginx/linux.com/ 2. Create a new configuration file for the domain vim /etc/nginx/conf.d/linux.com.conf 3. Add in the following contents ## Vi... Read More
Docker Cheat Sheet
Image Management List available images docker images Pull a docker image docker pull [Image-Name] Search for new docker images docker search [Image-Name] Remove a docker image docker rmi [Image-Name]:... Read More
Install Docker – CentOS
Verify that the Linux kernel is at or above 3.1 uname -r Add the docker repository vim /etc/yum.repos.d/ For CentOS 6: [dockerrepo] name=Docker Repo baseurl=https://yum.dockerproject.org/repo/mai... Read More