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Reading DSA Private and Public Key Files
This section provides a tutorial example on running the test program JcaKeyFactoryTest.java to generate, write, read and convert DSA private and public keys.
2022-10-08, ∼298🔥, 0💬

Falling Ball in Elevator Frame of Reference
This section provides an example of a falling ball in the elevator frame of reference, where we need to add a fictitious force to cancel out the gravitational force to make Newton's First and Second Laws of Motion valid.
2022-10-07, ∼298🔥, 0💬

DiffieHellman Private Key and Public Key Pair Sample
This section provides a tutorial example on how to run JcaKeyPair.java to generate a DiffieHellman private key and public key pair sample. Keys are stored PKCS#8 and X.509 encoding formats.
2022-10-07, ∼298🔥, 0💬

Capturing the HTTP Request from a Browser
This section provides a tutorial example on how to capture the HTTP request generated from a Web browser like Firefox with the socket server test program.
2022-10-05, ∼298🔥, 0💬

Using MD5 Message Digest in Perl
This section provides a tutorial example on how to use MD5 message digest algorithm in Perl. John Allen implemented the entire MD5 algorithm in 8 lines of Perl 5 code.
2022-10-04, ∼298🔥, 0💬

Collection Implementations in JDK
This section describes implementation classes of collections with various data structures in JDK 1.4.1: TreeSet, HashSet, LinkedHashSet, ArrayList, LinkedList, Vector, Stack, TreeMap, HashMap, IdentityHashMap, WeakHashMap, Hashtable.
2022-10-01, ∼298🔥, 0💬

Character Counter Program for Any Given Encoding
This section provides a tutorial example on how to write a simple program to count valid characters in a give encoding character set encoding.
2022-10-01, ∼298🔥, 0💬

Downloading and Installing JDK on Mac
This section describes how to download and install JDK 13 on a Mac computer
2022-10-01, ∼298🔥, 0💬

C Shell Command Line
This section provides a quick introduction of C shell command line.
2022-10-01, ∼298🔥, 0💬

Command Line Alias Substitution
This section provides a quick introduction of C shell command line alias substitution.
2022-10-01, ∼298🔥, 0💬

Command Line Variable Substitution
This section provides a quick introduction of C shell command line variable substitution.
2022-10-01, ∼298🔥, 0💬

Pushing an Email Message in Mail Queue
This section provides an example using Sendmail a Mail User Agent (MUA) to transfer a remote email message, which is stored in the mail queue waiting for a connection to the remote machine.
2022-10-01, ∼298🔥, 0💬

Archived: Commonly Used php_mysql.dll Functions
This section provides a list of commonly used MySQL functions provided by the php_mysql.dll extension.
2022-10-01, ∼298🔥, 0💬

Most Popular Operating Systems
The most popular operating systems based on browser signature strings in log files for 252 days of year 2007.
2022-10-01, ∼298🔥, 0💬

Bubble Sort - Implementation Improvements
This section provides discussion on how to improve the performance of the Bubble Sort implementation. There is no easy way to improve the Java implementation.
2022-10-01, ∼298🔥, 0💬

Crypt::Blowfish Behavior Tests
A tutorial Perl example is provided to show how to verify behaviors of Crypt::Blowfish module on different sizes of secret keys and plaintext messages.
2022-10-01, ∼298🔥, 0💬

pip3 - Package Installer for Python 3
This section provides a tutorial on how to use pip3 (Package Installer for Python 3) to manage and install packages.
2022-10-01, ∼298🔥, 0💬

"df" - Display Free Space of File System
This section provides a tutorial example on how to use 'df' command to display free spaces of mounted file systems on Linux systems.
2022-10-01, ∼298🔥, 0💬

"sudo" Command and Privilege
This section provides a tutorial example on how to grant 'sudo' privilege to a user to allow him/her to run 'sudo' command to gain 'root' permission without login as 'root'.
2022-10-01, ∼298🔥, 0💬

"jobs" - Manage Background Jobs
This section provides a tutorial example on how to use 'jobs' command to display background jobs, which are processes with input detached the keyboard. You can start a background job by adding the 'ampersand' sign to the end of the commmad.
2022-10-01, ∼298🔥, 0💬

Java Chinese Lunar Calendar
'中国年历算法和程式' tutorials were cited in a csdn.net article in 2024.
2025-01-07, ∼297🔥, 0💬

GD Library - Pad Transparent Image
This section provides a tutorial example on how to pad the transparent background of to expand an image using GD Library functions.
2024-07-29, ∼297🔥, 0💬

Introduction to Email
This chapter provides introductions on email and related technologies. Topics include SMTP, POP3 and IMAP protocols; SSL/TLS secure connections; MUA, MSA, MTA and MDA software agents.
2024-04-06, ∼297🔥, 0💬

"CREATE TABLE" - Creating New Tables
This section describes how to create a table through the JDBC interface.
2023-06-23, ∼297🔥, 0💬

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