ERROR: Couldn't connect to Docker daemon at http+docker://localunixsocket - is it running?

docker 每次都要sudo，或者其他服务启动的时候，提示上述的错误

如果还没有 docker group 就添加一个：
sudo groupadd docker
将用户加入该 group 内。然后退出并重新登录就生效啦。
sudo gpasswd -a ${USER} docker
重启 docker 服务
sudo service docker restart
切换当前会话到新 group 或者重启 X 会话
newgrp - docker

Run this command to download the current stable release of Docker Compose:
sudo curl -L "https://github.com/docker/compose/releases/download/1.24.0/docker-compose-$(uname -s)-$(uname -m)" -o /usr/local/bin/docker-compose 
To install a different version of Compose, substitute 1.24.0 with the version of Compose you want to use.

If you have problems installing with curl, see Alternative Install Options tab above.
Apply executable permissions to the binary:
sudo chmod +x /usr/local/bin/docker-compose
Note: If the command docker-compose fails after installation, check your path. You can also create a symbolic link to /usr/bin or any other directory in your path.

For example:
sudo ln -s /usr/local/bin/docker-compose /usr/bin/docker-compose
Optionally, install command completion for the bash and zsh shell.
Test the installation.
$ docker-compose --version
docker-compose version 1.24.0, build 1110ad01

转载于:https://www.cnblogs.com/studyNT/p/10836021.html

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