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A DevOps engineer needs to ensure that a containerized web application always restarts automatically if the container exits unexpectedly. Which Docker run option should be used?
The `--restart=always` policy ensures that the container restarts regardless of the exit code or reason for termination, including unexpected crashes. This is the correct choice for a containerized web application that must maintain high availability by automatically recovering f…Read full explanation
A system administrator wants to create a new user and set a password in a single command as part of a provisioning script. Which command accomplishes this?
Option B is correct because the `chpasswd` command reads username:password pairs from standard input, allowing a single command to create or update a user's password. When combined with `echo`, it sets the password for a new or existing user in one line, which is ideal for provis…Read full explanation
A Linux server that hosts a critical database application has been experiencing occasional kernel panics. The administrator wants to ensure the system automatically reboots after a panic and logs the crash dump. Which sysctl parameter should be set?
Option D is correct because setting `kernel.panic = 10` instructs the Linux kernel to wait 10 seconds after a kernel panic before automatically rebooting. This ensures the system recovers without manual intervention, and combined with a configured crash dump mechanism (e.g., kdum…Read full explanation
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