An administrator is troubleshooting an NGINX issue where the nginx -s reload command fails with 'nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)'. The NGINX process is running. What is the most likely cause and the correct fix?

Permission denied on the pid file; run as root

The pid file path is wrong; use nginx -s reload -p /custom/prefix

NGINX is not running; start it with systemctl start nginx

The nginx.pid file was deleted; restart NGINX to recreate it

An NGINX server is experiencing a configuration error that prevents a reload from succeeding. The administrator needs to revert to the previous working configuration and apply it. The master process PID is 7777. Which sequence of actions should be taken?

Restore the backup config file, then send HUP to PID 7777

Send TERM to PID 7777, then restart NGINX

Send USR1 to PID 7777 to reload logs

Send QUIT to PID 7777, then start NGINX with the old config

An administrator needs to perform a zero-downtime binary upgrade of NGINX. Which of the following signals must be sent to the old master process, and in what order? Select all that apply.

USR2 to start the new master process

WINCH to gracefully shut down old worker processes

HUP to reload the old master's configuration

TERM to fast-shutdown the old master

QUIT to stop the old master process

F5Certified Administrator NGINX - Troubleshooting

Domain 1Objective 1

Describe How to Send Signals to the NGINX Process F5N4 Practice Questions (Page 2)

Part of the Demonstrate how to stop, start, and reload NGINX binary domain, which makes up ~22% of our current practice bank. F5 does not publish an official question count, but from its 30-minute exam (~10–20 total, ~2–4 in this domain), expect 1–1 from this objective — we provide 20 practice questions to prepare you well beyond it. (estimate)

20questions here

4free pages

5concepts

Questions 6–10

6expert · hard
An administrator is troubleshooting an NGINX issue where the nginx -s reload command fails with 'nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)'. The NGINX process is running. What is the most likely cause and the correct fix?
Select an answer first
7expert · hard
An NGINX server is experiencing a configuration error that prevents a reload from succeeding. The administrator needs to revert to the previous working configuration and apply it. The master process PID is 7777. Which sequence of actions should be taken?
Select an answer first
8expert · hard · select all that apply
An administrator needs to perform a zero-downtime binary upgrade of NGINX. Which of the following signals must be sent to the old master process, and in what order? Select all that apply.
Select an answer first
9application · medium
An administrator needs to apply a new configuration to NGINX without interrupting active connections. The NGINX master process is running with PID 1234. Which command accomplishes this task?
Select an answer first
10application · medium
An NGINX master process is running with PID 9999. An administrator wants to perform a binary upgrade by starting a new master process alongside the old one. Which signal should be sent to PID 9999?
Select an answer first

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Describe How to Send Signals to the NGINX Process F5N4 Practice Questions (Page 2)

Questions 6–10

An administrator is troubleshooting an NGINX issue where the nginx -s reload command fails with 'nginx: [error] open() "/var/run/nginx.pid" failed (2: No such file or directory)'. The NGINX process is running. What is the most likely cause and the correct fix?

An NGINX server is experiencing a configuration error that prevents a reload from succeeding. The administrator needs to revert to the previous working configuration and apply it. The master process PID is 7777. Which sequence of actions should be taken?

An administrator needs to perform a zero-downtime binary upgrade of NGINX. Which of the following signals must be sent to the old master process, and in what order? Select all that apply.

An administrator needs to apply a new configuration to NGINX without interrupting active connections. The NGINX master process is running with PID 1234. Which command accomplishes this task?

An NGINX master process is running with PID 9999. An administrator wants to perform a binary upgrade by starting a new master process alongside the old one. Which signal should be sent to PID 9999?

Keep studying — Demonstrate how to stop, start, and reload NGINX binary