FROM: Sets the base image for subsequent instructions. Dockerfile must start with FROM instruction.

MAINTAINER: Sets the Author field for the generated images

LABEL: Adds metadata to an image. A label is a key-value pair

RUN ... Executes any commands in a new layer on top of the current image and commits the results. There are two forms:

Executable form. The square brackets are a part of the syntax

RUN <command> Run the command in the shell /bin/sh -c

RUN ["<executable>", "<param1>", "<param2>"]

CMD Provides defaults for executing container. There could be at most one CMD instruction in a Dockerfile

CMD ["<executable>", "<param1>", "<param2>"]

ENTRYPOINT Helps you configure a container that can be run as an executable. The ENTRYPOINT instruction adds an entry command that is not overwritten when arguments are passed to docker run. This is different from the behavior of CMD. This allows arguments to be passed to the entrypoint.

ENTRYPOINT ["<executable>", "<param1>", "<param2>"]

Informs Docker that the container listens on the specified network ports at runtime. Docker uses this information to interconnect containers using links and to set up port redirection on the host system

Sets the environment variable to the value. This value is passed to all future RUN, ENTRYPOINT, and CMD instructions

Copies new files, directories, or remote file URLs to the filesystem of the container at path <dest>. All new files and directories are created with mode 0755 and with the uid and gid of 0.

Like COPY, but additionally allows <src> to be an URL, and if <src> is an archive in a recognized format, it will be unpacked. The best practice is to prefer COPY.

Creates a mount point with the specified name and marks it as holding externally-mounted volumes from the native host or from other containers

Sets the username or UID used for running subsequent commands. <user> can be either username or UID; <group> can be either group name or GID

Sets the working directory for the RUN, CMD, ENTRYPOINT, COPY and ADD Dockerfile commands that follow. Relative paths are defined relative to the path of the previous WORKDIR

Defines a variable that users can pass at build-time to the builder with the docker build command using the --build-arg <varname>=<value> flag

Adds a trigger instruction to an image. The trigger is executed at a later time when the image is used as the base for another build. Docker executes the trigger in the context of the downstream build as if the trigger existed immediately after the FROM instruction in the downstream Dockerfile.

Here's a cheat-sheet to help you remember common docker commands.

Build an image from the Dockerfile in the current directory and tag the image.

List all images that are locally stored with the Docker Engine

Delete an image from the local image store.

Retag a local image with a new image name and tag

docker tag myimage:1.0 myrepo/myimage:2.0

Run a container from the Alpine version 3.9 image, name the running container “web” and expose port 5000 externally, mapped to port 80 inside the container.

docker container run --name web -p 5000:80 alpine:3.9

List the running containers (add --all to include stopped containers)

Docker is a fantastic tool designed to make it easier to create, deploy, and run applications by using containers.

Docker Command Cheat Sheet

db.posts.find().sort({ title: 1 }).pretty()

db.posts.find().sort({ title: -1 }).pretty()

db.posts.find({ category: 'news' }).count()

db.posts.find().limit(2).sort({ title: 1 }).pretty()

MongoDB Cheat Sheet

This is the basic template or barebone structure of HTML.

There are six headings available in HTML, H1 is the largest among all, and H6 is the smallest.

Container tags are the tags that contain some data such as text, image, etc. There are several container tags in HTML.

div tag or division tag is used to make blocks or divisions in the document.

code tag is used to represent source codes

Text formatting tags are used to format text or data of HTML documents. You can do certain things like creating italic, bold, strong text to make your document look more attractive and understandable.

Lists can be either numerical, alphabetic, bullet, or other symbols. You can specify list type and list items in HTML for the clean document.

Ordered list starts with <ol> tag and each list item starts with <li> tag

Media is anything that is present in digital form such as image, video, audio, etc.

It is used to embed sound content in the document.

Your browser does not support the audio element.

It is used to embed or import image in a webpage.

It is used to embed video in the webpage.

Your browser does not support the video tag.

In this blog post , we will know about HTML cheat sheets .we also know about many tags with brief description.

Introducing HTML cheat sheet includes a variety of tags.

Basic syntax and functions from the C programming language.

A comment is the code that is not executed by the compiler, and the programmer uses it to keep track of the code.

Typically a single octet(one byte). It is an integer type

The most natural size of integer for the machine

It is a sequence of characters starting with a backslash, and it doesn't represent itself when used inside string literal.

It represents the value of an octal number

It represents the value of a hexadecimal number

The null character is usually used to terminate a string

Conditional statements are used to perform operations based on some condition.

In this blog. we will discuss C Language CheatSheet.


C Language CheatSheet

In this blog, we will discuss Java Cheatsheet.

Java Cheatsheet

In this blog, we will discuss Java Programming Cheatsheet.

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Docker Command Cheat Sheet

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C Language CheatSheet

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Java Programming CheatSheet

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cheatsheet

Trending Blogposts on cheatsheet

Docker Command Cheat Sheet

MongoDB Cheat Sheet

Introducing HTML cheat sheet includes a variety of tags.

C Language CheatSheet

Java Cheatsheet

Java Programming CheatSheet

Popular Discussions on cheatsheet