Meld – visual diff and merge tool

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Meld is a visual diff and merge tool. Meld is used for comparing two or three files and editing them. We can compare two or three folders and launch file comparisons….



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pdftohtml converters  PDF documents into HTML format, which is more suitable for Internet publishing. The converter produces HTML documents with texts, pictures, graphics and bookmarks.

pdftohtml software does not require Adobe Acrobat, or even Acrobat Reader.

Install pdftohtml on Fedora/Linux:

# yum install pdftohtml
# which pdftohtml

Usage: pdftohtml [Option] <PDF File> [<HTM File>]


pdftk – fedora – merge pdf files

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Pdftk allows to manipulate PDF easily and freely. It does not require Acrobat, and it runs on Windows, Linux, Mac OS X, FreeBSD and Solaris etc.


  • Merge PDF Documents
  • Split PDF Pages into a New Document
  • Rotate PDF Pages or Documents
  • Decrypt Input as Necessary (Password Required)
  • Encrypt Output as Desired
  • Fill PDF Forms with FDF Data or XFDF Data and/or Flatten Forms
  • Apply a Background Watermark or a Foreground Stamp
  • Report on PDF Metrics such as Metadata, Bookmarks, and Page Labels
  • Update PDF Metadata
  • Attach Files to PDF Pages or the PDF Document
  • Unpack PDF Attachments
  • Burst a PDF Document into Single Pages
  • Uncompress and Re-Compress Page Streams
  • Repair Corrupted PDF (Where Possible)

Install pdftk on fedora/linux:

# yum install pdftk
# which pdftk

Merge Two or More PDFs into a New Document
# pdftk 1.pdf 2.pdf 3.pdf cat output 123.pdf

Resume Builder pdf2txt, word2txt

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Reading PDF Files

XPDF package includes “pdftotext.” You have to install XPDF/pdftotext then run the following PHP statement to get the PDF text:

$txtcontent = exec('/usr/local/bin/pdftotext svnlabs.pdf -');

Reading DOC Files

This package is called Antiword. Here’s the PHP code to grab the Word DOC content:

$txtcontent = exec('/usr/local/bin/antiword svnlabs.doc');

Publish HTML2PDF

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HTMLDOC converts HTML files and web pages into HTML, PostScript and PDF files suitable for on-line viewing and printing. HTMLDOC is used for anything that needs to be viewed or printed including on-line billing, books, financial statements, automated network configuration guides, mailing lists and labels, marketing flyers, quarterly reports, technical manuals, and users manuals. We can use HTMLDOC for all of documentation and reports, and it is the core of our PDF-o-matic demonstration page.


A limited-use open source version is also available at

# htmldoc --webpage -f output.pdf filename.html ENTER

# htmldoc --book -f 12book.pdf 1book.html 2book.html --titlefile bookcover.jpg ENTER

Configure Amazon EC2

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1.Boot 2 linux servers on EC2
2.Assign elastic IP to each of them
3.Register a domain (eg
4.On the domain settings – create 2 host records – and and point each record to each of the elastic IPs.
5.On your 2 nameserver instances – create dns zone for ns1. and ns2 respectively
6.Make ns2 a slave of ns1 – you can if you wish add ns3… ns4.. etc etc but its not necessary unless your site is getting millions of users.
7.Boot another EC instance and install the Scalr application.
8.Create a user on ns1. called “named” that has permissions to update the dns zone records on ns1.
9.The DNS settings of the scalr application will refer to the nameservers ns1. with user “named” and password as set on ns1.
10.Your application for example will have the domain  Register this domain and set its nameservers to your ns1. and ns2 mentioned previously.
11.You need to first create a new zone file on ns1 for
12.In Scalr when asked for the application domain name – simply enter – and scalr will handle the rest.


You will need to register a domain name with a domain registrar.  After registering, you will need to enter your NS records for the domain name.  The NS records should point to a Domain Name Server (DNS).  Most registrars require at least two DNS servers to eliminate a single point of failure.

Some registrars provide free DNS services.  If you choose such a registrar, you would need to add a CNAME record for your sub-domain and ask any DNS application support related questions to your registrar.

Alternatively, you can launch and configure your own DNS servers on Amazon EC2.  A popular choice for Linux based DNS servers is BIND:

Another option is to outsource your DNS servers using a third-party provider, for example


HTML WYSIWYG Editor for Fedora

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Quanta Plus is a web development tool for the K Desktop Environment. Quanta is designed for quick web development and is rapidly becoming a mature editor with a number of great features and lies at the heart of the KDE Web Dev suite of tools.

Bluefish is a powerful editor targeted towards programmers and webdesigners, with many options to write websites, scripts and programming code. Bluefish supports many programming and markup languages, and it focuses on editing dynamic and interactive websites.

Run C program in Linux

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This is the simple C file “svnlabs.c” to execute on linux terminal


int main()
int i;

printf(”n%d %s”,i,””);

return 0;


[root@localhost ~]# gcc svnlabs.c
[root@localhost ~]# make svnlabs
cc svnlabs.c -o svnlabs
[root@localhost ~]# ./svnlabs

[root@localhost ~]#

Run Java program in Linux

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This is the sample java file “” to be executed on linux command line…..

import java.lang.*;

public class Svnlabs

public static void main(String args[])



[root@localhost ~]# javac
[root@localhost ~]# java Svnlabs
[root@localhost ~]#