Free CompTIA Linux+ XK0-005 Practice Question

The use of && ensures that the subsequent command (service httpd restart) is executed only if the preceding command (yum update -y) completes successfully with an exit status of 0. Using ; does not check the success of the previous command. Using || only executes the subsequent command if the preceding one fails. Using & will put the first command in the background and immediately run the second one regardless of the first one's result.