How to view the last few lines of logs in docker

How to view the last few lines of docker logs: 1. Open the command window; 2. Dynamically view the last 100 lines of the log through the "docker logs -f -t --tail=100 c337e9df72a7" command.

The operating environment of this article: ubuntu 18.04 system, Docker version 20.10.11, Dell G3 computer.

How to view the last few lines of logs in docker?

docker dynamically view the last 100 lines of the log:

docker logs -f -t --tail=100 c337e9df72a7

refers to the real-time view of the last 100 lines of the log with the container ID c337e9df72a7

$ docker logs [OPTIONS] CONTAINER
  Options:
        --details        显示更多的信息
    -f, --follow         跟踪实时日志
        --since string   显示自某个timestamp之后的日志，或相对时间，如42m（即42分钟）
        --tail string    从日志末尾显示多少行日志， 默认是all
    -t, --timestamps     显示时间戳
        --until string   显示自某个timestamp之前的日志，或相对时间，如42m（即42分钟）

Example:

View the log after the specified time, only display the last 100 lines:

$ docker logs -f -t --since="2018-02-08" --tail=100 CONTAINER_ID

View the log for the last 30 minutes:

$ docker logs --since 30m CONTAINER_ID

View logs after a certain time:

$ docker logs -t --since="2018-02-08T13:23:37" CONTAINER_ID

View logs during a certain time period:

$ docker logs -t --since="2018-02-08T13:23:37" --until "2018-02-09T12:23:37" CONTAINER_ID

Recommended learning: "Docker Video Tutorial"

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