The command docker login is used to log in to a Docker registry.
$ docker login [OPTIONS] [SERVER]Here, SERVER can be either docker registry or any other self-hosted registry URL.
Options:
--password, -p → Password for registry--password-stdin → Take the password from STDIN--username, -u → Username for registrylocalhost:8000)$ docker login localhost:8000
Username: cloudyfox
Password:It will prompt for credentials.
OR, you can log in through the command straight:
# Using username and password
$ docker login localhost:8000 -u <username> -p <password> Also, you can run docker login command non-interactively. For this, you set --password-stdin flag to provide a password through STDIN.
$ cat /path/to/my_password.txt | docker login --username cloudyfox --password-stdinIn the above command, a password file is read and passed to the docker login command using STDIN.
Note: docker login requires sudo or root access when:
docker-machine provisioned docker engine)docker group. To logout from the docker registry:
$ docker logout localhost:8000