How Open Source Is Powering the Modern Mainframe



  • open mainframe

    To learn more about open source and mainframe, join us May 15 at 1:00 pm ET for a webinar led by Open Mainframe Project members Steven Dickens of IBM, Len Santalucia of Vicom Infinity, and Vincent Terrone of AIG.

    When I mention the word “mainframe” to someone, the natural response is colored by a view of an architecture of days gone by — perhaps even invoking a memory of the Epcot Spaceship Earth ride. This is the heritage of mainframe, but it is certainly not its present state.

    From the days of the System/360 in the mid 1960s through to the modern mainframe of the z14, the systems have been designed along four guiding principles of security, availability, performance, and scalability. This is exactly why mainframes are entrenched in the industries where those principles are top level requirements — think banking, insurance, healthcare, transportation, government, and retail. You can’t go a single day without being impacted by a mainframe — whether that’s getting a paycheck, shopping in a store, going to the doctor, or taking a trip.

    What is often a surprise to people is how massive open source is on mainframe. Ninety percent of mainframe customers leverage Linux on their mainframe, with broad support across all the top Linux distributions along with a growing number of community distributions. Key open source applications such as MongoDB, Hyperledger, Docker, and PostgreSQL thrive on the architecture and are actively used in production. And DevOps culture is strong on mainframe, with tools such as Chef, Kubernetes, and OpenStack used for managing mainframe infrastructure alongside cloud and distributed.

    Learn more

    You can learn more about open source and mainframe, both the history along with the current and future states of open source on mainframe, in our upcoming presentation. Join us May 15 at 1:00pm ET for a session led by Open Mainframe Project members Steven Dickens of IBM, Len Santalucia of Vicom Infinity, and Vincent Terrone of AIG.

    In the meantime, check out our podcast series “I Am A Mainframer” on both iTunes and Stitcher to learn more about the people who work with mainframe and what they see the future of mainframe to be.

    The post How Open Source Is Powering the Modern Mainframe appeared first on The Linux Foundation.

    https://www.linuxfoundation.org/blog/how-open-source-is-powering-the-modern-mainframe/





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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