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Becoming a Linux system administrator: From sales to sysadmin

Becoming a Linux system administrator: From sales to sysadmin

A look back at my journey to becoming a sysadmin—from sales to consulting to developer to sysadmin.
Joachim Haller
Fri, 1/22/2021 at 8:35pm

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Photo by 39422Studio from Pexels

In the early 80s, I was working as a salesman in the construction industry. Roofing and insulation had me traveling across Sweden presenting solutions and promoting various materials. Being out on the road was great, and no two days were alike. When I passed a construction site where our crew was working, they would always invite me, and I could pick up tips on new customers or just relax and chat and have a cup of coffee. I was young, free, and endlessly curious.

Topics:  
Linux  
Linux Administration  
Career  
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How to change the identity of a Linux system

Set the hostname on your Linux systems by using the hostnamectl command.
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5 questions to ask during your next sysadmin interview

If you’re heading to a sysadmin job interview, here are 5 questions to ask.
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How to replay terminal sessions recorded with the Linux script command

How to replay terminal sessions recorded with the Linux script command

Playback those recorded terminal sessions with the scriptreplay command.
khess
Thu, 1/21/2021 at 2:41pm

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Photo by cottonbro from Pexels

In my previous article, How to capture terminal sessions and output with the Linux script command, covering the script command and some common options, you learned how to record your interactive terminal sessions. This follow-up article demonstrates how to replay those recorded terminal sessions.

Topics:  
Linux  
Command line utilities  
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Quick start guide to Ansible for Linux sysadmins

Quick start guide to Ansible for Linux sysadmins

In this second article, you’ll explore the how-to of Ansible installation.
Pratheek Prabhakaran
Thu, 1/21/2021 at 2:15pm

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Photo by eberhard grossgasteiger from Pexels

In this article, I discuss the prerequisites for installing Ansible, Ansible installation using the Satellite server, setting up Ansible for automation, introduction to playbooks, inventory files, and go through a use case for Ansible. Check out the first article, Demystifying Ansible for Linux sysadmins, if you have not already.

Topics:  
Linux  
Linux Administration  
Ansible  
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The Maple Tree, A Modern Data Structure for a Complex Problem

We are always looking to solve hard problems and enhance the Linux Kernel. In this blog post, Oracle Linux kernel engineer Liam Howlett introduces a new data structure that he and Matthew Wilcox are developing.The Linux Memory Management layer supports the very common technique of virtual memory. Linux splits blocks of virtual memory into areas specified by the c structure vm_area_struct. Each vm_area_struct contain information…

Click to Read More at Oracle Linux Kernel Development

The Maple Tree, A Modern Data Structure for a Complex Problem

In recent years, processors have experienced growth in core counts which have pushed software to be multi-threaded and increased contention in the virtual memory data structure. The memory management subsystem uses the mmap_sem lock for write protection of the VMAs. Optimizing the mmap_sem lock into a rw-semaphore helped contention but did not solve the underlying issue. Even with a single threaded program and a well-intended system admin, contention does arise through proc file accesses for application monitoring.

In this blog, we introduce a new data structure that can track gaps, store ranges, and be implemented in an RCU compatible manner. This is the Maple Tree.
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How to capture terminal sessions and output with the Linux script command

How to capture terminal sessions and output with the Linux script command

The Linux script command allows you to create replayable terminal sessions by simply entering commands.
khess
Tue, 1/19/2021 at 4:12pm

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Photo by Sora Shimazaki from Pexels

The Linux script command creates a typescript file from your terminal session. This means that if you invoke the script command, you are dropped to a “watched and recorded” terminal session subshell that’s saved to an ASCII text file. When created with a timing file, you can replay the session, including output. The purpose of script is that you can easily grab sample output from any command through an interactive session exactly as it’s displayed in your terminal. You can use backspace, edit files, create files, and run simple or complex commands.

Topics:  
Linux  
Command line utilities  
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Blacks In Technology and The Linux Foundation Partner to Offer up to $100,000 in Training & Certification to Deserving Individuals

Program will provide verifiable, respected industry credentials to help promising individuals start an IT career

SAN FRANCISCO, January 19, 2021The Linux Foundation, the nonprofit organization enabling mass innovation through open source, and The Blacks In Technology Foundation, the largest community of Black technologists globally, today announced the launch of a new scholarship program to help more Black individuals get started with an IT career.

Blacks in Technology will award 50 scholarships per quarter to promising individuals. The Linux Foundation will provide each of these recipients with a voucher to register for any Linux Foundation administered certification exam at no charge, such as the Linux Foundation Certified IT Associate, Certified Kubernetes Administrator, Linux Foundation Certified System Administrator and more. Associated online training courses will also be provided at no cost when available for the exam selected. Each recipient will additionally receive one-on-one coaching with a Blacks In Technology mentor each month to help them stay on track in preparing for their exam. 

All Linux Foundation certification exams are conducted online with a proctor monitoring virtually via webcam and screen sharing. Scholarship recipients will have six months to sit for their exam, and should they fail to pass on the first attempt, one retake will be provided. Upon passing a certification exam, they will receive a PDF certificate and a digital badge which can be displayed on digital resumes and social media profiles, and which can be independently verified by potential employers. 

“We are extremely pleased to expand our partnership with Blacks in Technology to make quality open source education and certification more accessible to aspiring Black IT professionals,” said Linux Foundation SVP & GM of Training & Certification Clyde Seepersad. “While we have taken steps at The Linux Foundation to increase diversity in the open source community, there is a long way yet to go. There is so much potential talent out there, but without the resources and opportunities to nurture it, much will remain unfulfilled. We hope this program will help scholarship recipients start on the path to becoming successful IT professionals who can go on to mentor the next generation.”

“By removing the financial barrier to entry for our members, The Linux Foundation has empowered a new wave of diverse technical experts.” according to Dennis Schultz, Executive Director of the Blacks In Technology Foundation. “By offering training and certification options for all experience levels, we can meet people where they are in their technical journey and provide support along the way for long term success.”

Those interested in applying for a Blacks in Technology/Linux Foundation scholarship can do so by visiting https://foundation.blacksintechnology.net/programs/

About Blacks in Technology

The Blacks In Technology Foundation is a 501(c)(3) non-profit and the largest global community of Black technologists with a combined membership and social media reach of over 50,000. Membership in Blacks In Technology is free. The Blacks In Technology (BIT) Foundation’s goal and mission is to “stomp the divide” between Black workers and the rest of the tech industry and to fundamentally influence and effect change. BIT intends to level the playing field through training, education, networking, and mentorship with the support of allies, partners, sponsors, and members. For more information please visit blacksintechnology.net

About the Linux Foundation

Founded in 2000, the Linux Foundation is supported by more than 1,000 members and is the world’s leading home for collaboration on open source software, open standards, open data, and open hardware. Linux Foundation’s projects are critical to the world’s infrastructure including Linux, Kubernetes, Node.js, and more. The Linux Foundation’s methodology focuses on leveraging best practices and addressing the needs of contributors, users and solution providers to create sustainable models for open collaboration. For more information, please visit us at linuxfoundation.org.

The Linux Foundation has registered trademarks and uses trademarks. For a list of trademarks of The Linux Foundation, please see its trademark usage page: www.linuxfoundation.org/trademark-usage. Linux is a registered trademark of Linus Torvalds.

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The post Blacks In Technology and The Linux Foundation Partner to Offer up to $100,000 in Training & Certification to Deserving Individuals appeared first on Linux Foundation – Training.

A brief introduction to Ansible roles for Linux system administration

A brief introduction to Ansible roles for Linux system administration

In this part one of two articles, learn to use rhel-system-roles with your Ansible deployment to better manage functionality such as network, firewall, SELinux, and more on your Red Hat Enterprise Linux servers.
Shiwani Biradar
Mon, 1/18/2021 at 2:07pm

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Photo by RODNAE Productions from Pexels

Ansible is an open source automation platform that includes configuration management, application deployment, and infrastructure orchestration. It is a  popular automation tool for DevOps engineers and for system administrators. System administrators often face career burnout due to long hours and from performing repetitive tasks on many systems, but Ansible helps make these tasks easier to complete. Tasks such as user creation, service management, and software installs can be accomplished using Ansible.

Topics:  
Linux  
Linux Administration  
Ansible  
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