hadolint/DL3027

Do not use apt as it is meant to be an end-user tool, use apt-get or apt-cache instead.

Property	Value
Severity	Warning
Category	Best Practice
Default	Enabled
Auto-fix	Yes (`--fix`)

Description

apt is discouraged by the Linux distributions as an unattended tool as its interface may change between versions. Use the more stable apt-get and apt-cache commands in Dockerfiles instead.

Examples

Problematic code

FROM busybox
RUN apt install curl=1.1.0

Correct code

FROM busybox
RUN apt-get install curl=1.1.0

Auto-fix

Replaces apt with apt-get or apt-cache depending on the subcommand.

Safe fix (FixSafe): install, remove, update, upgrade, autoremove, purge, clean, autoclean are replaced with apt-get
Suggestion fix (FixSuggestion): search, show, policy are replaced with apt-cache

# Before
RUN apt install -y curl && apt search python

# After (with --fix)
RUN apt-get install -y curl && apt-cache search python

Reference

hadolint/DL3027

​Description

​Examples

​Problematic code

​Correct code

​Auto-fix

​Reference