Web progamming and database development

Copying files and folders from DOS

To copy all the files located in a folder "Suresh" then.

copy source destination

C:\>copy "Suresh*.*" "E:\Suresh\"

Copying and pasting folders, sub-folders and files, we need to use xcopy command
C:\>xcopy "H:\Suresh" "E:\Suresh" /e

Syntax of xcopy is

XCOPY source [destination] [/A | /M] [/D[:date]] [/P] [/S [/E]] [/V] [/W]
[/C] [/I] [/Q] [/F] [/L] [/G] [/H] [/R] [/T] [/U]
[/K] [/N] [/O] [/X] [/Y] [/-Y] [/Z]
[/EXCLUDE:file1[+file2][+file3]...]

Where,
source: Specifies the file(s) to copy.
destination: Specifies the location and/or name of new files.
/A Copies only files with the archive attribute set,
doesn't change the attribute.
/M Copies only files with the archive attribute set,
turns off the archive attribute.
/D:m-d-y Copies files changed on or after the specified date.
If no date is given, copies only those files whose
source time is newer than the destination time.
/EXCLUDE:file1[+file2][+file3]...
Specifies a list of files containing strings. Each string
should be in a separate line in the files. When any of the
strings match any part of the absolute path of the file to be
copied, that file will be excluded from being copied. For
example, specifying a string like \obj\ or .obj will exclude
all files underneath the directory obj or all files with the
.obj extension respectively.
/P Prompts you before creating each destination file.
/S Copies directories and subdirectories except empty ones.
/E Copies directories and subdirectories, including empty ones.
Same as /S /E. May be used to modify /T.
/V Verifies each new file.
/W Prompts you to press a key before copying.
/C Continues copying even if errors occur.
/I If destination does not exist and copying more than one file,
assumes that destination must be a directory.
/Q Does not display file names while copying.
/F Displays full source and destination file names while copying.
/L Displays files that would be copied.
/G Allows the copying of encrypted files to destination that does
not support encryption.
/H Copies hidden and system files also.
/R Overwrites read-only files.
/T Creates directory structure, but does not copy files. Does not
include empty directories or subdirectories. /T /E includes
empty directories and subdirectories.
/U Copies only files that already exist in destination.
/K Copies attributes. Normal Xcopy will reset read-only attributes.
/N Copies using the generated short names.
/O Copies file ownership and ACL information.
/X Copies file audit settings (implies /O).
/Y Suppresses prompting to confirm you want to overwrite an
existing destination file.
/-Y Causes prompting to confirm you want to overwrite an
existing destination file.
/Z Copies networked files in restartable mode.

The switch /Y may be preset in the COPYCMD environment variable.
This may be overridden with /-Y on the command line.

Moodle Installation - Blank page after Database screen

While trying to install moodle, I got the blank page after Database screen. To solve this issue, I went to different sites including the moodle forum and found nice solution there

http://moodle.org/mod/forum/discuss.php?d=100472
http://moodle.org/mod/forum/discuss.php?d=128498

What I did is that, I changed the created the new copy of config-dist.php and renamed it with config.php (config-dist.php is a template of config.php). The problem was becuase that it installation wizard couldn't create config.php file. So, I did the manual change in the file itself as follows:

 $CFG->dbtype    = 'mysql';  // mysql or postgres7 (for now)
$CFG->dbhost    = 'localhost'; // eg localhost or db.isp.com
$CFG->dbname    = 'moodle';   // database name, eg moodle
$CFG->dbuser    = 'root';    // your database username
$CFG->dbpass    = '';    // your database password
$CFG->prefix    = 'mdl_';  // Prefix to use for all table names 

 $CFG->wwwroot   = 'http://localhost/moodle'; 

 $CFG->dirroot   = 'C:\wamp\www\moodle'; 

 $CFG->dataroot  = 'C:\wamp/moodledata'; 

Save this configuaration and start to install again.

During installation, you will be forwarded to this URL below automatically
http://localhost/moodle/admin/index.php

You will see to go through processes where you have to click on Continue button. Good Luck :)

Managing User authentication with Restful Authentication Plugin

Restful Authentication Plugin is one of the best tools to manage user authentication.

To install:

gem install restful_authentication

After it gets installs run the following script:

script/generate authenticated user sessions

In this command, “authenticated” is the name of the generator; “user” is the name of the model that will store user names and passwords; and “sessions” is the name of the controller that will manage user sessions.

It will create the migration file for us. Then lets migrate the database

rake db:migrate