Important Instructions: CHFA and CHSA

Hyperledger is winding down the administration of the CHSA Exam, and May 11, 2021 will be the last date on which any CHSA Exam will be delivered.

Exam Details

  • The exams are delivered online and consist of performance-based tasks (problems) to be solved on the command line running Linux.

  • The exams consist of between 16-26 performance-based tasks.

  • Candidates have 2 hours to complete the exam.

  • The exams are proctored remotely via streaming audio, video, and screen sharing feeds.

  • Results will be emailed 24 hours from the time that the exam is completed.

System Requirements to take the exam

Exams are delivered online and Candidates must provide their own computer with:

  • Current version of Chrome or Chromium

    • you don’t need to install a virtual machine, use a client machine, or anything beyond a Chrome or Chromium browser.

    • Make sure you have third party cookies turned on for the duration of the exam.

  • Reliable internet access

    • Ensure others on the same internet connection are not performing activities that use excessive bandwidth (i.e. holding conference calls, streaming content, gaming, etc.)

    • A wired connection is often more stable and robust than a wireless connection

    • Turn off bandwidth-intensive services (e.g. file sync, dropbox, BitTorrent)

  • Microphone

    • Please check to make sure it is working before you start your exam session.

  • Webcam

    • Ensure the webcam is capable of being moved as the proctor may ask you to pan your surroundings to check for potential violations of exam policy.

    • Try holding up your ID while viewing your webcam feed to ensure your placement and resolution are sufficient for the person viewing your feed to read your ID.

    • If you will be testing from an employer-provide ISP or will use an employer provided machine, please ensure that streaming will be allowed using WebRTC.

Candidates should run the ​compatibility check too​l to verify that their hardware meets the minimum​ requirements.

Acceptable Testing Location

Below are the expectations for an acceptable testing location:

  • Clutter-free work area​

    • No objects such as paper, writing implements, electronic devices, or other objects on top of surface.

    • No objects such as paper, trash bins, or other objects below the testing surface.

  • Clear walls

    • No paper/print outs hanging on walls.

    • Paintings and other wall décor is acceptable.

    • Candidates will be asked to remove non-décor items prior to the exam being released.

  • Lighting

    • Space must be well lit so that proctor is able to see candidate’s face, hands, and surrounding work area.

    • No bright lights or windows behind the examinee.

  • Other

    • Candidate must remain within the camera frame during the examination.

    • Space must be private where there is no excessive noise. Public spaces such as coffee shops, stores, open office environments, etc. are not allowed.

Please see the Linux Foundation Certification Exams: Candidate Handboo​k for additional information covering policies, procedures and rules​ during the exam.

ID Requirements to take the Exam

  • Candidates are required to provide a non-expired Primary ID that contains Candidate’s photograph, signature and full name (see acceptable forms of ID in the table below)

  • The name on your Primary ID must exactly match the verified name on your exam checklist.

  • If the Candidate’s full name on their Primary ID contains non-latin characters, then the Candidate must ALSO provide a non-expired Secondary ID containing their full name in Latin Characters and signature, OR a notarized English translation of their Primary ID along with the non-latin character Primary ID

Primary ID

(non-expired and including photograph and signature)

Secondary ID

(non-expired and including signature with

Candidate name in Latin characters)


Government-issued driver’s license/permit Government-Issued local language ID (with photo and signature)

National Identity card

State or province-issued identity card​

住民基本台帳 (Basic resident register with Photo) or マイナンバーカード(My number card)

Debit (ATM) Card

Credit Card

Health Insurance Card

U.S. Social Security Card

Employee ID Card

Student ID Card

Japanese Health Insurance Card

Additional Allowances:

  • Some government issued ID such as a passport, driver’s license, military ID or state/country card may be a biometric type and may or may not contain a signature. In these cases Primary ID will be accepted without a signature on condition that you also present a Secondary ID which does contain your signature (e.g. bank, credit or debit card)

  • For candidates testing in Japan, a Driver’s License (with name and recent recognizable photo) is acceptable as a primary ID as long as it is accompanied with a Japanese health insurance card (健康保険証). In Japan, the Japanese health insurance card (健康保険証) is an acceptable form of secondary ID

  • Minors, between the age of 16-18, are permitted to take an online proctored exam with PSI, provided they complete the following requirements:

    • A Parent/Guardian must complete the Parental Release for Testing of Minors form, and submit it to, at least 2 weeks prior to the scheduled date of the exam

    • At check in, the minor candidate must present a valid student ID as a form of identification

    • During the PSI check-in process, the candidate's guardian must also present a valid ID and must provide verbal consent during the PSI check-in process.

Sanctioned Countries

Exams may be administered to citizens of a sanctioned country listed below PROVIDED the citizens are tested OUTSIDE the sanctioned country and their exam registration and current ID show an address OUTSIDE the sanctioned country.

  • Cuba

  • Iran

  • Syria

  • Sudan

  • North Korea

  • Crimea Region of Ukraine

Resources allowed during exam for CHSA and CHFA

  • Candidates may use their Chrome or Chromium browser to open one additional tab in order to access assets at and its subdomains.​ No other tabs may be opened and no other sites may be navigated to. The allowed site above may contain links that point to external sites. It is the responsibility of the candidate not to click on any links that cause them to navigate to a domain that is not allowed.

  • Please see the Candidate Handbook​ f​or additional information covering policies, procedures and rules during the exam.

  • Answers to Frequently Asked Questions (FAQ) can be found here​.


Technical Instructions

You may access these instructions at any time while taking the exam by typing 'man lf_exam'.

  1. Root privileges can be obtained by running ‘sudo -i’.

  2. You should avoid rebooting node-1, as the supporting infrastructure will take around 15 minutes to start, and stabilize. You are free to reboot any node other than node-1 at any time.

  3. Do not stop or tamper with the certerminal or sshd configuration and process on node-1 as this will END YOUR EXAM SESSION.

  4. Do not block incoming ports 8080/tcp, 4505/tcp and 4506/tcp. This includes firewall rules that are found within the distribution's default firewall configuration files as well as interactive firewall commands.

  5. Use Ctrl+Alt+W instead of Ctrl+W.

    Ctrl+W is a keyboard shortcut that will close the current tab in Google Chrome.

  6. Ctrl+C and Ctrl+V are not supported in your exam terminal.

    For Linux: select text for copy and middle button for paste (or both left and right simultaneously if you have no middle button).

    For Mac: ⌘+C to copy and ⌘+V to paste. For Windows: Ctrl+Insert to copy and Shift+Insert to paste.

  7. Installation of services and applications included in this exam may require modification of system security policies to successfully complete.

  8. Only a single terminal console is available during the exam. Terminal multiplexers such as GNU Screen and tmux can be used to create virtual consoles.

  9. To change font size in the terminal please use the native Chrome keys: Ctrl and '+' or Ctrl and '-'.

  10. You should avoid changing the locale of the system during your exam.

  11. You should not manipulate the firewall of node-1, or tamper with any of the running lxd or dnsmasq processes.

Environment Details for CHSA and CHFA

  • Each question on this exam must be completed on a designated Sawtooth node.

  • This exam comprises several single, two and three-node Sawtooth networks, with each peer running on separate machines.

  • At the start of each task, you will be directed to which Sawtooth node(s) you should ​ssh​ to in order to complete the task .

  • You can ​ssh​ to a Sawtooth node with a command such as: ​ssh [email protected]<nodename​>

  • You can ​ssh​ between machines in a network comprising more than one node, unless where otherwise noted.

  • The ​sawadm​ user should be used for all tasks, unless otherwise indicated.

  • You can assume elevated privileges on any node by issuing the following command: ​sudo -i

  • You must return to the base node (hostname node-1) after completing each task.

  • The exam is based on Sawtooth v1.0.5.

  • Each task on this exam must be completed on a designated Fabric node, most of which run Fabric under docker/docker-compose​.

  • Most​ of the networks are based off of byfn​ with configuration files located under​ /srv/fabric-samples, unless otherwise noted in the instructions.​

  • For most tasks, you can connect to the CLI node with a command such as: docker exec -it cli bash.

  • At the start of each task, you will be directed to which Fabric node you should ssh​ to in order to​ complete the task.

  • You can ssh to a Fabric node with a command such as:

    ssh [email protected]<nodename>

  • The fabadm​ user should be used for all tasks, unless otherwise indicated.​

  • You can assume elevated privileges on any node by issuing the following command: sudo -i

  • You can also use sudo​ to execute commands with elevated privileges at any time.​

  • You must return to the base node (hostname node-1​ )​ after completing each task.

  • The exam is based on Fabric v1.4 Fabric v2.2 coming in June 2021