amolkhanorkar

Cron

Cron is a daemon that executes scheduled commands. Cron is started automatically from /etc/init.d on entering multi-user runlevels.

Cron searches its spool area (/var/spool/cron/crontabs) for crontab files (which are named after accounts in /etc/passwd); crontabs found are loaded into memory. 

Note that crontabs in this directory should not be accessed directly - the crontab command should be used to access and update them.
command : crontab -e

Cron wakes up every minute, examining all stored crontabs, checking each command to see if it should be run in the current minute.

amolkhanorkar

Capistrano

To get started, you need to install the capistrano gem:
  gem install capistrano capistrano-ext

Once you have the gem installed go to your application’s directory and capify the app.
  
  cd /path/to/app
  capify .

amolkhanorkar

Apache tomcat setup

Pre-requisites

JDK (java) should be install.
1. To Install Java

Download tarball package.

Goto the downloaded directory. Extract tarball jdk-6u31-linux-x64.tar.gz

amolkhanorkar

mongoDB
Installation on Ubuntu

sudo apt-get update 

sudo apt-get install mongodb-10gen

OR 

sudo apt-get install mongodb

amolkhanorkar

How to Create a New User

In Part 1 of the MySQL Tutorial, we did all of the editing in MySQL as the root user, with full access to all of the databases. However, in the cases where more restrictions may be required, there are ways to create users with custom permissions.

Let’s start by making a new user within the MySQL shell:
CREATE USER 'newuser'@'localhost' IDENTIFIED BY 'password';

Sadly, at this point newuser has no permissions to do anything with the databases. In fact, if newuser even tries to login (with the password, password), they will not be able to reach the MySQL shell. 

Therefore, the first thing to do is to provide the user with access to the information they will need.

amolkhanorkar

Change MySQL Collation
On ubuntu when we install the mysql it takes the default database character set as swidish.
But we need the character set as UTF-8.

Read this article for more details : http://dev.mysql.com/tech-resources/articles/4.1/unicode.html

Also read this article for more information about storing the data in Indian launguages in your mysql database,

http://mrothouse.wordpress.com/2006/09/18/mysql-database-character-set/

amolkhanorkar

<VirtualHost *:80>
.
.
.
	RewriteEngine On
	RewriteCond %{HTTP_HOST} ^(www\.)?example\.com [NC]
        RewriteRule ^(.*)$ http://www.example.com$1 [R=301,NC,L]  
.
.
.

amolkhanorkar

LDAP server setup
1] Setup Ubuntu Server 64-bit (Use "Minimal install" in "Modes".)

2] sudo apt-get install slapd ldap-utils migrationtools

You will be prompted for the LDAP admin password. Please remember it.

3] sudo mv /etc/ldap/slapd.d /etc/ldap/slap.d.orig

4] sudo dpkg-reconfigure slapd

amolkhanorkar

======= Prolbem =================================================================================================================
I have installed : ruby-2.0.0,postgres-9.2 , now in rails app when I execute:

      rake db:create , command I get:

PG::InvalidParameterValue: ERROR:  new encoding (UTF8) is incompatible with the encoding of the template database (SQL_ASCII)
HINT:  Use the same encoding as in the template database, or use template0 as template.
: CREATE DATABASE "my_db_name" ENCODING = 'unicode'.......

      bin/rake:16:in `load'

amolkhanorkar

Start and stop the server on Windows
Start and stop the server on Linux
Start and stop Apache
Start and stop the server on Windows

Start the server from the Start menu
Choose Start > All Programs > Adobe > Flash Media Server 4.5 > Start Adobe Flash Media Server 4.5.
Choose Start > All Programs > Adobe > Flash Media Server 4.5 > Start Flash Media Administration Server 4.5.
Stop the server from the Start menu