The Linux Foundation Announces Free Introduction to Open Source Networking Technologies Course

  • The online course, available on, teaches fundamentals needed to adopt SDN, NFV, disaggregation, orchestration, network automation and modern networking

    SAN FRANCISCO, May 30, 2018The Linux Foundation, the nonprofit organization enabling mass innovation through open source, today announced the opening of enrollment for LFS165x – Introduction to Open Source Networking Technologies. Students may pre-register now for this free course, and full course content will be available beginning in early August.

    The 2017 Open Source Jobs Report from The Linux Foundation and Dice found nearly half of hiring managers are looking to hire individuals with networking expertise, and 55 percent report that formal training or certification is a priority when choosing new hires. On top of that, the way networks are built and deployed is evolving, with open source networking projects being responsible for much of this transformation.

    LFS165x explores open source networking projects, from The Linux Foundation and beyond, that are shaping the future of networking and telecoms. Designed for open source enthusiasts, university students, network architects and engineers, security architects and engineers, and system engineers, this course offers an introduction to open source networking.

    This course covers the open networking stack from top to bottom, starting from networking hardware disaggregation and modern 100G and 400G switches, through network operating systems, network controllers, virtualization and orchestration. Students will develop an understanding of the use cases and technical options for modern open networking in enterprises, service providers, and cloud datacenters. The course provides familiarity with the following open source networking projects and their use cases:

    • Open Compute Project, ONIE, Akraino
    •, OVS, IO Visor, DPDK, Open Dataplane, P4
    • OpenSwitch, Open Network Linux, FRR, DANOS, SONIC, FBOSS
    • OpenDaylight, Tungsten Fabric (OpenContrail), ONOS, CORD, Open Security Controller
    • PNDA, SNAS

    “Open source software is becoming core to the networking industry, with software-defined networking and network function virtualization sitting at the heart of coming 5G technologies,” said Linux Foundation General Manager, Networking Arpit Joshipura. “There is a major need for more individuals with the qualifications to develop and implement these technologies. This course, along with other open source networking courses from The Linux Foundation and edX, is a great first step for individuals looking to break into this fast-growing industry, and also to help industry veterans gain a baseline understanding of these concepts.”

    Students will leave the course with an understanding of:

    • The software-defined and open source networking landscape
    • How networking hardware is being disaggregated
    • How open network operating systems (NOS) run on different networking hardware
    • Ways to automate networking tasks
    • How software-defined network (SDN) controllers manage underlay networks
    • How network function virtualization (NFV) can help reduce the complexity of today’s data center environments
    • Ways orchestration tools can build a bridge between applications and networking

    The Linux Foundation and edX already offer two additional open source networking courses, LFS163x – Introduction to ONAP: Complete Network Automation and LFS164x – NFV Acceleration: An Introduction to OPNFV, which also provide useful knowledge for individuals looking to improve their open source networking skills.

    LFS165x was developed by Reza Toghraee, a network and security expert. For the last 20 years, Toghraee has designed and deployed many large campus and datacenter projects, leveraging his skills in networking, security, virtualization, compute, and storage across a range of major networking vendors.

    In 2013, Toghraee started exploring the hardware and software of Ethernet switches and was inspired to build an AVB (Audio Video Bridging) Ethernet switch by designing hardware and software protocols. Soon he discovered SDN and early SDN controllers and dedicated his time to promoting and contributing to SDN and the OpenNetworking community. He is the director of ArpaWare Ltd in the UK, a professional services consultancy for SDN, NFV, network automation, network virtualization and cloud projects. Toghraee is the author of Learning OpenDaylight and he is currently authoring another book about Data Plane programming.

    Registration is open now for LFS165x on There is no charge for the course, though a verified certificate of completion is available for $99.

    About The Linux Foundation

    The Linux Foundation is the organization of choice for the world’s top developers and companies to build ecosystems that accelerate open technology development and industry adoption. Together with the worldwide open source community, it is solving the hardest technology problems by creating the largest shared technology investment in history. Founded in 2000, The Linux Foundation today provides tools, training and events to scale any open source project, which together deliver an economic impact not achievable by any one company. More information can be found at

    The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see our trademark usage page:

    Linux is a registered trademark of Linus Torvalds.

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    The post The Linux Foundation Announces Free Introduction to Open Source Networking Technologies Course appeared first on The Linux Foundation.

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
re-attach a detached session tmux attach OR
tmux attach-session
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]
  • Use the same script for updating/ upgrading

    Make sure to change the versions to the latest releases:

    #!/bin/bash set -e bpcver=4.2.1 bpcxsver=0.57 rsyncbpcver=

    Scroll through the script, know what you are doing.

    Uncomment the upgrade section(s) and comment out the install section(s)

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  • Again running smartctl after all is said and done:

    smartctl --all /dev/sda

    ddrescue-smartctl-after-rescue.png ddrescue-smartctl-2.png

    Yet an old drive in itself, I run the wheels off of them, and monitor regularly as anyone should.

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