Arpan Tech-i

The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)

2012-01-18T01:46:00.000-08:00

The Absolute Minimum Every Software Developer Absolutely, Positively Must Know About Unicode and Character Sets (No Excuses!)

Find All Symlinks (Symbolic Links)

2011-12-07T23:33:00.000-08:00

Find All Symlinks under current folder find . -type l -exec ls -l {} \; Find All Symlinks (Symbolic Links) on a Linux System find / -type l -exec ls -l {} \; > ~/symlinks.txt

Unix File Permission

2011-11-30T02:58:00.001-08:00

How to change permissions (chmod) of a filePermissions can be very important when it comes to hosting your website. Permissions can allow our server computer to write and edit your files. Along with that, some files need to be protected from writing and editing, as a security measure. You can change your file permissions in many ways. Using File ManagerOne of the easy and basic ways to change

How to backup and restore PuTTY settings

2011-04-07T23:48:00.001-07:00

PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham. Official PuTTY site is: http://www.chiark.greenend.org.uk/~sgtatham/putty/. PuTTY is an open source software and its free, licensed under MIT license. To backup: Windows XP: Click Start Menu >> Run Windows Vista: Click

git: throw away uncommitted changes

2011-04-01T12:07:00.000-07:00

git: revert (reset) a single file This one is hard to find out there so here it is. If you have an uncommitted change (its only in your working copy) that you wish to revert (in SVN terms) to the copy in your latest commit, do the following: git checkout filename This will checkout the file from HEAD, overwriting your change. This command is also used to checkout branches, and you could

Validate Credit Card Formula

2011-03-08T11:01:00.000-08:00

For example take card number "4866 3060 7833 1744" reverse - 4471 3387 0603 6684 create a string with every other number starting with the 2nd number "47376364" now create a string with every number doubled "814617126128" now append a string with the digits that you did not use in step 1 to the string with the numbers doubled "41380068" (new string will be 81461712612841380068 ) now sum the

File format

2011-01-24T22:27:00.000-08:00

Vim recognizes three file formats (unix, dos, mac) that determine what line ending characters (line terminators) are removed from each line when a file is read, or are added to each line when a file is written. A file format problem can display ^M characters, or can prevent scripts from running correctly. This tip explains how to avoid problems, and how to convert from one file format to another.

SUDO - Give selective super user powers to users or a group of users

2009-06-24T23:23:00.001-07:00

SUDO - Give selective super user powers to users or a group of users Sudo is a program which can be used by normal users to execute programs as super user or any other user - provided they are given the rights to do so. Sudo access is controlled by /etc/sudoers . The users listed in /etc/sudoers file can execute commands with an effective user id of 0 and a group id of root's group. This

How to add a user to the sudoers list

2009-06-24T23:20:00.000-07:00

How to add a user to the sudoers list google_protectAndRun("ads_core.google_rendeHow to add a user to the sudoers list? Beleive it or not, this is a fairly common question and in all reality the answer is quite simple. Adding a

PHP-MySQL Interview Question

2008-05-02T07:47:00.000-07:00

Q:1 What are the differences between Get and post methods in form submitting.give the case where we can use get and we can use post methods? A:1 When to use GET or POST The HTML 2.0 specification says, in section FormSubmission (and the HTML 4.0 specification repeats this with minorstylistic changes): –>If the processing of a form is idempotent(i.e. it has no lasting observable effect on

What's New in PHP 5?

2008-05-02T02:05:00.000-07:00

PHP5 by Andi Gutmans Upload File to Server# scp config.php username@www.youdomain.com:/home/rootdir/filename.php-->Download file

Apache's Module (Somthing useful in httpd.conf for Web Programmer)

2005-11-08T01:12:00.001-08:00

If you want to include any New settings whithout editing httpd.conf file then copy following line once into your server httpd.conf file. And later if you want to add new Module then edit subdomain.confand restart the server.#------------------------------------------Include /home/jyve_conf/subdomain.conf#------------------------------------------ DirectoryIndex: sets the file that

How to create SubDomains by editing httpd.conf

2005-11-08T01:12:00.000-08:00

VirtualHost: If you want to maintain multiple domains/hostnames on yourmachine you can setup VirtualHost containers for them.Types of Virtual Hosting1) IP-Based Virtual Hosting2) Name-Based Virtual Hosting3) Dynamic Virtual HostingGood Example how to set subDomains under NameBased Virtual Hosting :NOTE: NameVirtualHost cannot be used without a port specifier(e.g. :80) if mod_ssl is

MySql IFNULL, IF, CASE-WHEN-THEN -ELSE-END

2005-11-08T01:11:00.000-08:00

IFNULL(expr,expr1)--------------------------------------------If 1st_ expr is null then retrun 2nd_exprSELECT IFNULL(1,0); -> 1SELECT IFNULL(NULL,10); -> 10SELECT IFNULL(1/0,10); -> 10SELECT IFNULL(1/0,'yes'); -> 'yes'--------------------------------------------------------------CASE WHEN condiion THEN expr1 ELSE expr3 END-------------------------------------

MySQL Functions (Usefull in Programming)

2005-11-08T01:10:00.000-08:00

I am running on MySql 3.23.58 version1 . Concat the String SELECT CONCAT('My', 'S', 'QL');-> MySQL-----------2. Concat with Word SeparatorSELECT (CONCAT_WS(",","First name","Second name","Last Name")) as fullname;-> First name,Second name,Last Name-----------3. String LengthSELECT LENGTH('text');->4-----------3. String Padding (Add characters to string) String must contin 4

Example for Mod RewriteRule

2005-11-08T01:07:00.000-08:00

#--MOD Rewirite--RewriteEngine OnRewriteRule ^dir/(.*) /home/httpd/vhosts/jyvepresence.com/httpdocs/index.php?status=$1#-----------------------# URL will be # http://www.domain.com/dir/vikrant# It will execute index.php# $1 == vikrant #------------------------RewriteRule ^/?([^/]*\.png|[^\./]*)[:;,\.]*$ /home/httpd/vhosts/jyvepresence.com/httpdocs/index.php?status=$1 [L,NS]#-----------

Javascript Cookies

2005-11-08T01:05:00.000-08:00

// JavaScript Document/*** Sets a Cookie with the given name and value.** name Name of the cookie* value Value of the cookie* [expires] Expiration date of the cookie (default: end of current session)* [path] Path where the cookie is valid (default: path of calling document)* [domain] Domain where the cookie is valid* (default: domain of calling document)* [secure] Boolean value indicating if the