2.36. Docker exec command

2.36.1. Grammar ¶

docker exec [OPTIONS] CONTAINER COMMAND [ARG...]

OPTIONS description:

• -d : Split mode: running in the background

• -i : Keep STDIN open even if there is no attachment

• -t : Assign a pseudo terminal

2.36.2. Example ¶

Execute the in-container / root/runoob.sh script in interactive mode in the container mynginx:

runoob@runoob:~$ docker exec -it mynginx /bin/sh /root/runoob.sh
http://www.runoob.com/

Open an interactive mode terminal in the container mynginx:

runoob@runoob:~$ docker exec -i -t  mynginx /bin/bash
root@b1a0703e41e7:/#

You can also use the docker ps-a command to see which containers are already running, and then use the container ID to enter the container.

Check the container ID that is already running:

# docker ps -a
...
9df70f9a0714        openjdk             "/usercode/script.sh…"
...

The 9df70f9a0714 in the first column is the container ID.

Bash the specified container through the exec command:

# docker exec -it 9df70f9a0714 /bin/bash

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