How to Get Involved with Hyperledger Projects



  • Hyperledger

    A recent webinar, Get Involved: How to Get Started with Hyperledger Projects, focuses particularly on making Hyperledger projects more approachable.

    Few technology trends have as much momentum as blockchain — which is now impacting industries from banking to healthcare. The Linux Foundation’s Hyperledger Project is helping drive this momentum as well as providing leadership around this complex technology, and many people are interested in getting involved. In fact, Hyperledger nearly doubled its membership in 2017 and recently added Deutsche Bank as a new member.

    A recent webinar, Get Involved: How to Get Started with Hyperledger Projects, focuses particularly on making Hyperledger projects more approachable. The free webinar is now available online and is hosted by David Boswell, Director of Ecosystem at Hyperledger and Tracy Kuhrt, Community Architect.

    Hyperledger Fabric, Sawtooth, and Iroha

    Hyperledger currently consists of 10 open source projects, seven that are in incubation and three that have graduated to active status. “The three active projects are Hyperledger Fabric, Hyperledger Sawtooth, and Hyperledger Iroha,” said Boswell.

    Fabric is a platform for distributed ledger solutions, underpinned by a modular architecture. “One of the major features that Hyperledger Fabric has is a concept called channels. Channels are a private sub-network of communication between two or more specific network members for the purpose of conducting private and confidential transactions.”

    According to the website, Hyperledger Iroha is designed to be easy to incorporate into infrastructural projects requiring distributed ledger technology. It features simple construction, with emphasis on mobile application development.

    Hyperledger Sawtooth is a modular platform for building, deploying, and running distributed ledgers, and you can find out more about it in this post. One of the main attractions Sawtooth offers is “dynamic consensus.”

    “This allows you to change the consensus mechanism that’s being used on the fly via a transaction, and this transaction, like other transactions, gets stored on the blockchain,” said Boswell. “With Hyperledger Sawtooth, there are ways to explicitly let the network know that you are making changes to the same piece of information across multiple transactions. By being able to provide this explicit knowledge, users are able to update the same piece of information within the same block.”

    Sawtooth can also facilitate smart contracts. “You can write your smart contract in a number of different languages, including C++ JavaScript, Go, Java, and Python,” said Boswell. Demonstrations and resources for Sawtooth are available here:

    How to contribute to Hyperledger projects

    In the webinar, Kuhrt and Boswell explain how you can contribute to Hyperledger projects. “All of our working groups are open to anyone that wants to participate, including the training and education working group,” said Kuhrt. “This particular working group meets on a biweekly basis and is currently working to determine where it can have the greatest impact. I think this is really a great place to get in at the start of something happening.”

    What are the first steps if you want to make actual project contributions? “The first step is to explore the contributing guide for a project,” said Kuhrt. “All open source projects have a document at the root of their source directory called contributing, and these guides are really to help you find information about how you’d file a bug, what kind of coding standards are followed by the project, where to find the code, where to look for issues that you might start working with, and requirements for pull requests.”

    Now is a great time to learn about Hyperledger and blockchain technology, and you can find out more in the next webinar coming up May 31:

    Blockchain and the enterprise. But what about security?

    Date: Thursday, May 31, 2018
    Time: 10:00 AM Pacific Daylight Time

    This talk will leave you with understanding how Blockchain does, and does not, change the security requirements for your enterprise. Sign up now!

    Submit to Speak at Hyperledger Global Forum

    Hyperledger Global Forum will offer the unique opportunity for more than 1,200 users and contributors of Hyperledger projects from across the globe to meet, align, plan, and hack together in-person. Share your expertise and speak at Hyperledger Global Forum! We are accepting proposals through Sunday, July 1, 2018. Submit Now >>

    The post How to Get Involved with Hyperledger Projects appeared first on The Linux Foundation.

    https://www.linuxfoundation.org/blog/how-to-get-involved-with-hyperledger-projects/





Tmux Commands

screen and tmux

A comparison of the features (or more-so just a table of notes for accessing some of those features) for GNU screen and BSD-licensed tmux.

The formatting here is simple enough to understand (I would hope). ^ means ctrl+, so ^x is ctrl+x. M- means meta (generally left-alt or escape)+, so M-x is left-alt+x

It should be noted that this is no where near a full feature-set of either group. This - being a cheat-sheet - is just to point out the most very basic features to get you on the road.

Trust the developers and manpage writers more than me. This document is originally from 2009 when tmux was still new - since then both of these programs have had many updates and features added (not all of which have been dutifully noted here).

Action tmux screen
start a new session tmux OR
tmux new OR
tmux new-session
screen
re-attach a detached session tmux attach OR
tmux attach-session
screen-r
re-attach an attached session (detaching it from elsewhere) tmux attach -d OR
tmux attach-session -d
screen -dr
re-attach an attached session (keeping it attached elsewhere) tmux attach OR
tmux attach-session
screen -x
detach from currently attached session ^b d OR
^b :detach
^a ^d OR
^a :detach
rename-window to newname ^b , <newname> OR
^b :rename-window <newn>
^a A <newname>
list windows ^b w ^a w
list windows in chooseable menu ^a "
go to window # ^b # ^a #
go to last-active window ^b l ^a ^a
go to next window ^b n ^a n
go to previous window ^b p ^a p
see keybindings ^b ? ^a ?
list sessions ^b s OR
tmux ls OR
tmux list-sessions
screen -ls
toggle visual bell ^a ^g
create another window ^b c ^a c
exit current shell/window ^d ^d
split window/pane horizontally ^b " ^a S
split window/pane vertically ^b % ^a |
switch to other pane ^b o ^a <tab>
kill the current pane ^b x OR (logout/^D)
collapse the current pane/split (but leave processes running) ^a X
cycle location of panes ^b ^o
swap current pane with previous ^b {
swap current pane with next ^b }
show time ^b t
show numeric values of panes ^b q
toggle zoom-state of current pane (maximize/return current pane) ^b z
break the current pane out of its window (to form new window) ^b !
re-arrange current panels within same window (different layouts) ^b [space]
Kill the current window (and all panes within) ^b killw [target-window]
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