A systems administrator is writing a script to automate server maintenance. The script needs to update all system packages and then restart the web server daemon, but only if the package update process completes successfully. Which of the following commands correctly implements this logic on a modern RHEL-based system?
The use of && ensures that the subsequent command (systemctl restart httpd.service) is executed only if the preceding command (dnf update -y) completes successfully with an exit status of 0. Using ; executes both commands sequentially regardless of the first command's success. Using || executes the second command only if the first one fails. Using & runs the first command in the background and immediately executes the second, without waiting for the first to complete or checking its exit status.
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What does the `&&` operator do in Linux commands?
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How does the `||` operator differ from the `&&` operator in Linux?