Unable to login to docker from command line - Ubuntu

[vivganes]

Error seen after "sudo docker login":
Post http:///var/run/docker.sock/v1.17/auth: dial unix /var/run/docker.sock: no such file or directory. Are you trying to connect to a TLS-enabled daemon without TLS?

vivek@gvivek-gsu-hyd:~$ uname -a
Linux gvivek-gsu-hyd 3.13.0-48-generic #80-Ubuntu SMP Thu Mar 12 11:16:15 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

I have logged out and logged in after installing docker using steps at http://docs.docker.com/installation/ubuntulinux/

Could you please help me in getting docker to run?

[marcelloromani]

/var/run/docker.sock: no such file or directory.

It could be a problem related to docker daemon not automatically starting under certain Ubuntu versions. See #12002 for an example.

Which version of Ubuntu are you running?
cat /etc/lsb-release

Is the daemon running?
sudo service docker status

[dustinkirkland]

'Twas exactly my problem. Fixed with 'sudo service docker start'. A more meaningful error message would be nice.

[cpuguy83]

Closing since there's no response, and also seems pretty apparent that docker is not started.