Use the APT indexes to inspect the packages required, recommended, or conflicting with bash.
Do not install anything.
Which command is appropriate?
apt-cache depends shows forward dependency relationships. apt-cache rdepends performs the reverse lookup of packages depending on the target.
Detailed explanation
apt-cache depends bashCorrect. apt-cache depends bash displays bash's dependency relationships.
apt-get depends bashIncorrect. apt-get does not provide this query subcommand.
dpkg -L bashIncorrect. dpkg -L lists files rather than dependencies.
apt-cache rdepends bashIncorrect. rdepends answers the reverse question, not the dependencies required by bash.
Try it yourself
An example you can run in a temporary verification environment.
apt-cache depends bash 2>/dev/null | headExpected result
bashのDepends、PreDepends、Suggests等（索引により異なる）Key points
- depends shows forward dependencies
- rdepends shows reverse dependencies
- The query does not change the system
Notes
- Environment: Debian系 / APT 2.x
- Command output formatting can vary slightly by distribution or tool version.
- Run the example in a temporary directory or process when possible.
Foundation review
Read the scope first
Check whether the command acts on the current shell, a new process, an existing process, or a file.
Verify the observable result
Use the supplied command and compare the output with the expected result.