ruby and rails installation on ubuntu

Installation of ruby and rails in ubuntu

to install ruby and rails in ubuntu 10.10 follow the procedure for the installation of ruby & rails

to install ruby

#apt-get install ruby-full

after this the ruby will be installed

then after this for download the ruby gems

#wget production.cf.rubygems.org/rubygems/rubygems-1.3.7.tgz

after this the rubygems will be downloaded as a .tar file then extract the the downloaded file

#tar-xvf rubygems-1.3.7.tgz

after this move to th rubygem directory

#cd rubygems-1.3.7/

after this install the rubygems

#ruby setup.rb

here the ruby gem will be installed

create link file the gems

#ln -s /usr/bin/gem1.8 /usr/bin/gem

then insall gem like this

#gem install rdoc

for the installation of rails 2.3.8 version of rails

#gem install –version=2.3.8 rails --include-dependencies

after this the ruby and rails will be installed

after this install the below package for the installation of mysql gem

#apt-get install libmysql-ruby libmysqlclient-dev

#gem install mysql

here the gem for mysql will be installed

installation of phpmyadmin for lamp in ubuntu

                                        PHPMYADMIN

how to install php myadmin in ubuntu? Its a simple process to install php my admin in ubuntu

# sudo apt-get install phpmyadmin

after this the installation of phpmyadmin completes

# sudo dpkg-reconfigure -plow phpmyadmin

after this create a link file between phpmyadmin and apache2 (installation depends on the earlier post)

if you install lamp it will be reflected like this

#sudo ln -s /etc/phpmyadmin/apache.conf /etc/apache2/conf.d/phpmyadmin.conf

after this a link file will be created between myadmin and apache

then restart the server

# sudo /etc/init.d/apache2 restart

after this go to browser and type like http://localhost/phpmyadmin

installation of lamp in ubuntu

                                         Lamp server

Installation of lamp is same as xammp but the only difference is we use linux in the place of the windows

lamp can be installed in ubuntu. if we install the lamp server we will get mysql, php, linux

#sudo apt-get install lamp-server^

here the (^) is important because it will be installed only if we use ^ .so don't miss this symbol (^)

after this the lamp will be installed

after this will ask for the mysql root password for the creation of the database

after this it will be completed

to test your apache server go to the browser and type this http://localhost

then it will be opened like “it works” so by this you can confrim that the apache working

then to test you php do like this

#sudo nano /var/www/testing.php

here a file will be created then edit this file as follows

<?php phpinfo(); ?>

then save the file

then restart the apache server

#sudo /etc/init.d/apache2 restart

after the installation go to the browser and type http://localhost/testing.php

then it will be resloved as a page in the browser

after the installationof lamp checxk for the bind address

# cat /etc/hosts | grep localhost

here it will show the local hosts

#cat /etc/mysql/my.cnf | grep bind-address

in the configuration file file you can see the bind address as 127.0.0.1. it will be as default if not means cange the bind address of the my.cnf file

why to upgrade server from small to medium in amazon

Upgradation of servers from m1.small to m1.medium or large instances :

We are using the small instance. But it is not capable to run more apps. It is capable to run upto 15 to 20 apps. So we have to upgrade the hardware of small instance. So after small instances there is medium instances are there. So we have to upgrade m1.small to m1.medium instance.

2xm1.small = 1 m1.medium . so we can deploy up to 40 to 45 apps in medium instance.

Upgradation :

• If we upgrade from current small instance to medium instance, there is chances to data loss. So avoid data loss first save the entire server as image and save that image in s3 bucket. Then boot the new m1.medium instance from the saved image.
• At the time of saving image we have to stop all the services and then save the image.
• It takes nearly 1 to 2 hours for saving the image. (down time)
• From that image we can boot the new instance.
• New instance having the new ip.
• So After launching the new instance we can make some changes in proxy, firewall, mail relay, name resolution, monitoring and maybe something else, I don't remember-- they need to get the new ip.
• And then shut down the old small instance.

Billing for medium instance :

Small instance $0.090 Per/Hour

Medium instance $0.180 Per/Hour

For 1 small instance monthly bill is $64.8 per/month

For 1 medium instance monthly bill is $129.6 per/month

usb bootable pen drive in windows

                          USB BOOTABLE DRIVE

for quick installation of o.s we would like to go for usb bootable drive by this we can save buying a dvd

here down we'll show to create a usb drive with windows 7, for this you require 4gb pendrive or more than that and windows 7 cd which is genuine

1. in windows 7 go to start button in acces Click Start -> All Programs -> Accessories and right-click on Command Prompt and run it as administrator then in the command promot type like this
   DISKPART
2. Then afteer type like this
   LIST DISK
3. Then after you can see disk 0 and disk 1 in the bottom
   then type like this one after the other you will get like this
   SELECT DISK 1
   CLEAN
   CREATE PARTITION PRIMARY
   SELECT PARTITION 1
   ACTIVE
   FORMAT FS=NTFS
   ASSIGN
   EXIT
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
   
4. after this the formatting of the pendrive will take about 30 mintues, sfter this open the mycomputer you will find the pendrive as the F: drive and the cd inserted in the cd tray will be as E: drive then after this type the command as below

   E:/BOOT/BOOTSECT.EXE /NT60 F:

5. Successfully installed NFTS file system bootcode

   after this you insert the windows 7 cd in the cd drive
   then open the the cd and copy all the files into the pendrive
   this will takle time after this your pen drive will be ready to use as a usb bootable drive
   
   

creating and appending files in ubuntu

How to create files in ubuntu, and view the content of files using editors

there are different types of editors in ubuntu, you can use nano, vi, vim these editors to view the content of the file

to install vim do like this

#apt-get install vim

then this will be installed

1. to create an empty file
   #touch sunny
   here an empty file will be created with 0 bytes
2. to create a file with some matter in it
   #cat > mom
   hi mom how are you
   then ctrl+d to save
3. to view the connect of the file
   # cat mom
   hi mom how are you
4. to append the matter in already present file
   # cat >> mom
   hi mom how are you
   hi mom this is your son
   ctrl+d to save
5. to view the content you can use these
   #vim mom
   after this to save w!
   To save and quit wq
   To save and quit forcefully wq!
   To quit forcefully q!
   and other like this
   #vi mom
   and also can use
   #nano mom
   here click x to save
   and Y for yes

how to log into root account in ubuntu after installing

 how to log into root account in ubuntu after installing


after installation of the ubuntu you are asked to log in as root for this you do like this
when you install ubuntu with a user name then do like this
# sudo passwd root
after this you will ask for the normal user password and then
you will promtted with the new password then create the password after this you log in to root
like this


# su root


here give the new password for the root


then you can log in as root