PuTTY VS Leap Second

• Free and Open Source
  PuTTY is free to use and its source code is openly available. This allows flexibility for users to modify it according to their needs and ensures that there are no licensing costs associated with its usage.
• Wide Protocol Support
  PuTTY supports various network protocols including SSH, Telnet, SCP, and SFTP. This makes it versatile for different types of server management and data transfer tasks.
• Lightweight
  PuTTY is a lightweight application that consumes minimal system resources, making it suitable for use on older or less powerful systems without significant performance degradation.
• Extensible Configuration Options
  PuTTY offers a wide range of configuration options for terminal emulation, keyboard mappings, and connection settings, giving users fine control over their connections and workflow.
• Portability
  PuTTY can be run as a portable application from USB drives or other external storage devices without the need for a formal installation process on the host system.

Possible disadvantages

• No Integrated File Manager
  Unlike some other SSH clients, PuTTY does not come with an integrated file manager, which can make tasks involving file transfers less convenient without the use of PuTTY's separate utilities like PSCP or WinSCP.
• Limited Scripting Capabilities
  PuTTY itself lacks advanced scripting capabilities which can be a limitation for users who need to automate sessions or workflows extensively. External tools or extensions are necessary for these needs.
• Basic User Interface
  The user interface of PuTTY is quite basic compared to modern applications. It lacks some of the polished features and aesthetics that other terminal clients might offer.
• No Tabbed Sessions
  PuTTY does not natively support multiple tabbed sessions within a single window, which can make managing multiple connections less convenient. Users typically need to open multiple instances of the application.
• Windows-Centric
  While PuTTY is primarily developed for Windows, its cross-platform capabilities through ports like PuTTY for Mac or Linux are not as well-supported, leading to potential inconsistencies and lack of features compared to the Windows version.

• Keeps civil time aligned with Earth's rotation
  Leap seconds keep UTC within 0.9 seconds of UT1, which is based on Earth's actual rotation. Clock time therefore stays tied to the position of the Sun and does not drift away from the solar day.
• Supports astronomy and celestial navigation
  Telescope pointing, satellite tracking and some legacy navigation systems assume UTC is close to UT1. Leap seconds avoid the need for separate corrections in those systems.
• Small, frequent adjustments instead of big jumps
  Adding single seconds when needed avoids a much larger correction later, such as a leap minute or leap hour, which would be more disruptive and harder to explain to the public.
• Internationally standardized process
  The IERS decides on leap seconds and announces them about six months ahead. This gives a single authoritative, globally coordinated mechanism that timekeeping systems can follow.

Possible disadvantages

• Causes software and infrastructure failures
  A 23:59:60 timestamp breaks assumptions in many systems, such as monotonic time and 60-second minutes. Past leap seconds have caused crashes, hangs and outages in operating systems, databases and cloud services.
• Unpredictable schedule
  Earth's rotation speed varies irregularly, so leap seconds cannot be predicted far in advance. Systems that need long-term time calculations cannot know future UTC offsets, so they need frequent updates.
• Inconsistent handling across systems
  Some systems step the clock, some repeat a second, and others smear the extra second over hours, as Google and AWS do. These differences can leave clocks briefly disagreeing, which hurts distributed systems, logging and financial timestamping.
• Being phased out
  In 2022 the CGPM voted to stop using leap seconds by or before 2035. Anything built around them has an uncertain long-term future, and the planned replacement will let UTC drift from solar time.
• Website details unverified
  I can't access https://www.leapsecond.co, so these points describe leap seconds as a concept, not that site's specific product or service. Check the site directly for its features, pricing and quality.

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