Important Instructions: CHFA

Exam Details

  • The exam is delivered online and consist of performance-based tasks (problems) to be solved on the command line running Linux.
  • The exam consists of between 16-26 performance-based tasks.
  • Candidates have 2 hours to complete the exam.
  • The exam is 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

Candidates should run the PSI Online System Security Check to verify that their machine meets the technical requirements for taking a proctored exam.
The online proctored exam is taken on PSI proctoring platform "Bridge", using the PSI Secure Browser (a web browser created to guarantee a secure exam delivery over a virtual connection).
The secure browser download/installation will begin when you Select “Launch exam” from the PSI Dashboard.
Candidates must provide their own computer with:
  • Supported OS: Please review the System Requirements, published by PSI, in particular the supported Operating System Information.
  • All browsers are supported, however PSI highly recommends using Chrome as the registration browser because the secure browser is Chrome-based and will give a more accurate experience.
  • One active monitor (either built in or external) (NOTE: Dual Monitors are NOT supported) The Linux Foundation recommends a screen size of 15” or higher to support the ExamUI.
  • 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
    • Mac users may need to allow the PSI Secure Browser within their 'System Preferences: Security & Privacy: Privacy' settings for Microphone, Camera, Automation and Input Monitoring.
    • Please check to make sure it is working before you start your exam session.
  • Webcam
    • Ensure the webcam is capable of being moved as you will have to pan your surroundings to check for potential violations of exam policy.
    • Mac users may need to allow the PSI Secure Browser within their 'System Preferences: Security & Privacy: Privacy' settings for Microphone, Camera, Automation and Input Monitoring.
    • 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 are not allowed to have other applications or browser windows running except the one on which the Exam is being shown.
Please review the PSI Bridge Platform: System Requirements to ensure your machine will meet the requirements of our online proctor.

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 need to provide identification (ID) that meets the requirements outlined below:
  • All IDs must be valid (unexpired) Government-issued originals (i.e. not a photocopy)
  • IDs must include the candidate's name, photo, and signature*
    • *Government-issued biometric IDs that do not contain signature will be accepted
  • The first and last name on the ID must exactly match the verified name entered on your exam checklist
  • Acceptable forms of ID:
    • International travel passport
    • Government-issued driver’s license/permit
    • Government-Issued local language ID (with photo and signature)
    • National identity card State or province-issued identity card
    • Alien registration card (green card or permanent resident/visa)
    • 住民基本台帳 (Basic Resident Register with photo) or マイナンバーカード(My Number Card)
  • 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 CHFA

During the exam, Candidates may only use the browser within the VM to access the following documentation:
The allowed sites above may contain links that point to other external sites. Candidates will be prohibited from accessing these sites.

Technical Instructions

  1. 1.
    Use CTRL+ALT+W instead of CTRL+W, which is a keyboard shortcut that will close the current tab in Google Chrome.
  2. 2.
    The Terminal (Terminal Emulator Application) is a Linux Terminal; to copy & paste within the Linux Terminal you need to use LINUX keyboard shortcuts:
    Copy = Ctrl+SHIFT+C (inside the terminal) Paste = Ctrl+SHIFT+V (inside the terminal) OR Use the Right Click Context Menu and select Copy or Paste
  3. 3.
    For security reasons, the Insert key is prohibited within the Remote Desktop. Candidates can Type i to switch into insert mode so that you can start editing the file. Once you're done, press the escape key Esc to get out of insert mode and back to command mode.
  4. 4.
    Installation of services and applications included in this exam may require modification of system security policies to successfully complete.
  5. 5.
    To change font size in the terminal please use the native Chrome keys: Ctrl and '+' or Ctrl and '-'.
  6. 6.
    You should avoid changing the locale of the system during your exam.
  7. 7.
    You should not manipulate the firewall of node-1, or tamper with any of the running lxd or dnsmasq processes.
  8. 8.
    There is a Quick Reference box containing technical information you need at the top of each task.
    1. 1.
      Click the title bar to open and close the box.
    2. 2.
      Blue boxes contain information you need to complete a task.
    3. 3.
      Yellow boxes contain warnings.
    4. 4.
      Red boxes contain the most critical warnings!

Environment Details for CHFA

  • The exam is based on Fabric v2.2
  • Each task on this exam must be completed on the designated Fabric host - this is critical to scoring your exam.
  • All hosts run Fabric under Docker, most networks were started using Docker Compose.
  • Unless noted otherwise, the networks are based off of test-network with configuration files located under /fabric-samples/test-network.
  • For most tasks, you can connect to the CLI node with the following command:
    docker exec -ti cli bash
Connecting to Hosts:
  • At the start of each task, you will be directed to which Fabric host you must ssh to.
  • Unless noted otherwise, the default username is candidate.
ssh <fabric-host> You must return to the base node after completing each task - this is critical to scoring your exam.
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On this page
Exam Details
System Requirements to take the exam
Acceptable Testing Location
ID Requirements to take the Exam
Sanctioned Countries
Resources allowed during exam for CHFA
Technical Instructions
Environment Details for CHFA