June Tech Dump

Just a collection of news and tools i learned this month. Comment down below if you know any other tool.

Theory

Actor Model

• Conceptual Model for concurrent computation.
• Originated in 1973

What is Actor ?

• Fundamental unit of computation.
• Light weight than thread.
• Isolated from each other.
• Has it own private State.
• No Share memory.
• Updating the private state happens through recieving message.
• Communication happens through messages.
• Each actor has it own mailbox where all messages are recieved.
• Inorder to commnicate between other Actor, The actor need to know the address of Actor.
• Actor can run in single machine or run in mutiple machine

What Actor can do ?

• Create Another Actor
• Send a message
• Designate How to handle the next message

Cons

• Susceptible to deadlocks
• Mailbox overflowing

Linux Man page

The entire Linux manual collection of pages are traditionally divided into numbered sections:

• Section 1 : Shell commands and applications
• Section 2 : Basic kernel services – system calls and error codes
• Section 3 : Library information for programmers
• Section 4 : Network services – if TCP/IP or NFS is installed Device drivers and network protocols
• Section 5 : Standard file formats – for example: shows what a tar archive looks like.
• Section 6 : Games
• Section 7 : Miscellaneous files and documents
• Section 8 : System administration and maintenance commands
• Section 9 : Obscure kernel specs and interfaces
• Usage

man <section number> <command>
eg:
man 3 printf
man 4 inet

Tools

Cross Compiler Docker Image

• Cross compiler docker image
• Provide ability to build software for other system from linux.
• Example:
  • You can build binary for Arm64 Linux from x86_64 Linux

https://github.com/dockcross/dockcross

IPFS - InterPlanetary File System

• Decentralized network similar to Torrent
• When you upload the data to the network you get CID (Content IDentifier)
• Using CID we can access others data.
• We can deploy website in it too.

brew install ipfs

https://awesome.ipfs.io/

• Pining service is used to keep your data when you goes offline

Go chromecast

• Cast video to chrome cast from terminal. Install go-chromecast for mac

brew install go-chromecast

• List devices in the network and the uuid

go-chromecast ls

• Load the media file

go-chromecast -u <uuid> load <file>

• Command line graphics interface to control seek, pause and play.

go-chromecast ui
go-chromecast -u <uuid> ui

Barrier - Share keyboard and mouse with other computer

• Install the barrier in the systems you wish to share your keybord and mouse.

https://github.com/debauchee/barrier

• One system act as server and other act as client
• Start the server
• In server click server configuration and Add new screen
• Then enter the screen name (Exactly same as the client(other computer) screen name(screen name can be found in the client barrier software))
• Open the barrier in client and connect to the server by specificing ip address and port or it can be done automatically by default.
• Now you can share the keyboard and mouse Automagically.