How to View Docker Container Logs Easily

Use the docker logs [container_name_or_id] command to view the logs of a running or stopped Docker container. Add -f to follow the logs live as new entries appear.

Syntax

The basic command to view logs is docker logs [OPTIONS] CONTAINER.

• CONTAINER: The container's name or ID whose logs you want to see.
• -f: Follow the log output live, like watching a live feed.
• --tail N: Show only the last N lines of logs.

bash

docker logs [OPTIONS] CONTAINER

Example

This example shows how to run a container and then view its logs live.

bash

docker run -d --name mynginx nginx

docker logs mynginx

docker logs -f mynginx

Output

a1b2c3d4e5f6g7h8i9j0k1l2m3n4o5p6q7r8s9t0u1v2w3x4y5z6

[logs output of nginx container]

[logs output live as new entries appear]

Common Pitfalls

Common mistakes when viewing container logs include:

• Using the wrong container name or ID, which causes an error.
• Not using -f when you want to watch logs live.
• Expecting logs from containers that have no output or have been removed.

Always check container status with docker ps -a before viewing logs.

bash

docker logs wrong_container_name
# Error: No such container: wrong_container_name

docker logs -f mynginx
# Correct usage to follow logs live

Output

Error: No such container: wrong_container_name
# Live logs will stream after this command

Quick Reference

Command	Description
docker logs CONTAINER	Show all logs of the container
docker logs -f CONTAINER	Follow logs live as they appear
docker logs --tail 100 CONTAINER	Show last 100 lines of logs
docker ps -a	List all containers to find names or IDs

Key Takeaways

Use docker logs CONTAINER to see container logs.

Add -f to follow logs live in real time.

Check container names or IDs with docker ps -a before viewing logs.

Use --tail to limit how many log lines you see.

Logs are only available for existing containers, not removed ones.