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http://workflowpatterns.com/

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Linux server configuration notes

apt-get purge exim4-config

apt-get install dstat lsof htop vim unzip strace sudo screen
apt-get install virtualenv python-pip python-dev supervisor

vim

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// Source: http://unix.stackexchange.com/a/251769/17594
// Modifications: long long, exit codes, diagnostics

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <sys/ptrace.h>
#include <sys/socket.h>
#include <arpa/inet.h>

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Change hostname / user after VM clone

Step1. change hostname

1. edit /etc/hostname
2. edit /etc/hosts
3. run hostname -F /etc/hostname
4. check the new hostname running hostname command

NOTICE: Renaming user needs to login as root, for doing this you can:

1. add root password sudo passwd root

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Springboot project structure recommentation

config - class which will read from property files

cache - caching mechanism class files

constants - constant defined class

controller - controller class