In Docker, a Dockerfile is a script that contains instructions to build a container image. The first line in a Dockerfile is typically the FROM directive, which specifies the base image from which the container will be built.
* The correct syntax for specifying a base image is:rubyCopyEditFROM <image>:<tag>If no tag is provided, Docker will pull the latest version of the specified image by default.
The correct syntax for specifying a base image is:rubyCopyEditFROM <image>:<tag>If no tag is provided, Docker will pull the latest version of the specified image by default.
The correct syntax for specifying a base image is:rubyCopyEditFROM <image>:<tag>If no tag is provided, Docker will pull the latest version of the specified image by default.
The correct syntax for specifying a base image is:rubyCopyEditFROM <image>:<tag>If no tag is provided, Docker will pull the latest version of the specified image by default.
The correct syntax for specifying a base image is:rubyCopyEditFROM <image>:<tag>If no tag is provided, Docker will pull the latest version of the specified image by default.
* httpd is the official Apache HTTP Server image available in Docker Hub.
* The incorrect options:
* BASE httpd # Incorrect, as there is no such directive in Dockerfile syntax.
* USE httpd # Incorrect, this is not a valid Docker command.
* INHERIT httpd # Incorrect, as Docker does not use INHERIT to specify base images.
Thus, the correct answer is A. FROM httpd.
References:
* CompTIA Linux+ Official Documentation
* Dockerfile Reference - Docker Docs
* Official httpd Docker Image