Linux Introduction

Some historical fact for Linux:

In 1991, in Helsinki, Linus Torvalds began a project that later became the Linux kernel. He wrote the program specifically for the hardware as he wanted to use the functions of his new PC with an 80386 processor.

What is Linux?

Linux is an Operating System.

What is Operating System?

Low level software that supports a computer’s primitive function such as scheduling tasks and controlling peripherals.

Types of Operating System:

1. System Software: System software are those software which incorporate the programs that are dedicated to manage the computer itself, such as the operating system, file management utilities, and disk operating system.For instance : Linux , Windows etc

2. Application Software: Application software or simply applications, are often called productivity programs or end-user programs because they enable the user to complete. Specific examples of application software incorporate Microsoft Office, Excel and Outlook, Google Chrome, Mozilla Firefox and Skype.

3. Utilized Software: Utilized Software or a business application is any software or set of computer programs used by business users to perform variety of business functions.  For instance: Antivirus, McAfee etc.

Finally we conclude: Linux is Open Source Operating System. Specifically Linux is System Software providing an interface between user and computer.

Advantages of Linux:

• Linux is very durable.
• Linux is less susceptible to computer malware.
• Linux as compared to other OS is fast and does not slow down over time.
• Old desktop/Laptops can be given new life using Linux OS
• Linux has variety of distributors so we have many varieties in Linux.
• Because there are many distributors you can freely access this software.
• It’s a superior method of upgrading software

Disadvantages of Linux:

• Many windows programs will not run in Linux thus requires a change.
• There is a smaller selection of peripheral hardware drivers for Linux.
• People who are new to Linux requires to learn this skill thoroughly in order to use the Operating System.
  

Features of Linux OS:

• There are two prompts in Linux
  • $ -> Local user prompt
  • # -> Admin user prompt or Root Prompt
• Commands are followed by switches but it does not matter in which order we are using switch.
  Example: ls –lrt is same as ls –rtl same as ls -l -r -t
• Linux is case sensitive so using upper case will give different output and lower case different.
• Linux is Open source operating system.
• Several program are running at same time.
• Several users on same machine at same time

Wild characters in Linux

Endorsement Framework

Endorsement Framework:

• Validation by a second user of an action taken on a “static data entity” (e.g. Bank) by a first user.
• Provides functionality to generate endorsement events when a User performs an action on an endorsable entity.
• Manages endorsement events while they await approval by a User.
• Examples of static data entities for which endorsement can be setup:
  • Bank
  • Bank User Role
  • Business Calendar
  • Participant
  • Exchange condition
  • Products
• Endorsement activation depends on a configuration file setup:
  • Either all entities or no entities require endorsement
  • Setup is done on the level of Bank Group
• Actions that trigger the creation of an endorsement event are:
  • Creation of an entity
  • Update to an entity
  • Activation of an entity
  • Suspension of an entity
  • Deletion of an entity
• For each endorsement audit records, capturing the modifications made by the User, are created.
• The default behaviour for endorsement is to hide the modified details from the user until endorsement is done successfully.
• Each instance of an endorse-able entity has an endorsement status:.
  • Pending endorsement for Modification
  • Pending endorsement for Deletion
  • Pending endorsement for Creation
  • Pending endorsement for Suspension
  • Pending endorsement for Activation
  • No Endorsement outstanding
• Only a single active endorsement event can be pending against an entity.

Warehouse

Warehouse:

• The processing of some transactions must be split in two steps.
• This typically applies to Transactions that are received before the day they are executed.
  • Some validations are performed the day the Transaction is received, to make sure it is valid.
  • Extra validations are performed the day the Transaction is executed, for instance, to make sure the account still exists, or funds are available.
• Based on the Exchange Timings computed by the router, and on the type of Transaction, the system determines if the Transaction must be held or not.