Combining RUN commands in Docker - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the Dockerfile line to combine two commands in one RUN instruction using the correct operator.

Docker

RUN apt-get update [1] apt-get install -y curl

Drag options to blanks, or click blank then click option'

A||

B|

C;

D&&

Attempts:

3 left

💡 Hint

Common Mistakes

Using ';' runs commands regardless of success.

Using '|' pipes output, not for chaining commands.

Using && ensures the second command runs only if the first succeeds, which is best practice in Dockerfiles.

2fill in blank

medium

Complete the Dockerfile RUN command to update packages and clean cache in one line.

Docker

RUN apt-get update [1] apt-get upgrade -y [2] apt-get clean

Drag options to blanks, or click blank then click option'

A&&

B;

C||

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using ';' runs commands regardless of success.

Using '||' runs next command only if previous fails.

Using && between commands ensures each runs only if the previous succeeds, which is safer for Docker builds.

3fill in blank

hard

Fix the error in this Dockerfile RUN command by choosing the correct operator to combine commands.

Docker

RUN mkdir /app [1] cd /app [2] git clone https://repo.url

Drag options to blanks, or click blank then click option'

A&&

B;

C|

D||

Attempts:

3 left

💡 Hint

Common Mistakes

Using ';' runs commands regardless of success.

Using '|' pipes output, not for chaining commands.

Using && ensures each command runs only if the previous one succeeds, preventing errors in the build.

4fill in blank

hard

Fill both blanks to combine commands that update, install, and clean in one RUN instruction.

Docker

RUN apt-get update [1] apt-get install -y nginx [2] apt-get clean

Drag options to blanks, or click blank then click option'

A&&

B;

C||

D|

Attempts:

3 left

💡 Hint

Common Mistakes

Using ';' runs commands regardless of success.

Using '||' runs next command only if previous fails.

Using && between commands ensures each runs only if the previous succeeds, which is best practice.

5fill in blank

hard

Fill all three blanks to create a RUN command that updates, installs curl, and cleans cache safely.

Docker

RUN apt-get update [1] apt-get install -y [2] [3] apt-get clean

Drag options to blanks, or click blank then click option'

A&&

Bcurl

D;

Attempts:

3 left

💡 Hint

Common Mistakes

Using ';' instead of '&&' breaks safe chaining.

Missing the package name causes install failure.

Use && to chain commands safely and specify curl as the package to install.