Let's say I want to tag a Docker image, and make a typo. How do I remove the tag without removing the image itself? Neither the manpages nor the Docker documentation mention removing tags.
docker tag 0e5574283393 my-imaj
docker tag 0e5574283393 my-image
# docker untag my-imaj # There is no "docker untag"!
Where do Docker containers get their time information? I've created some containers from the basic ubuntu:trusty image, and when I run it and request 'date', I get UTC time.
For awhile I got around this by doing the following in my Dockerfile:
RUN sudo echo "America/Los_Angeles" > /etc/timezone
However, for some reason that stopped working. Searching online I saw the below suggested:
docker run -v /etc/timezone:/etc/timezone [image-name]
Both these methods correctly set the timezone though!
$ cat /etc/timezone
America/Los_Angeles
$ date
Tue Apr 14 23:46:51 UTC 2015
Anyone know what gives?
How can I check what modules have been added to an nginx installation?
I would like to know if there's a way to tell which local branch is tracking which remote branch in Git.
I'm using one remote server, which is named "origin".
I need to troubleshoot some problems related to environment variables on a Unix system.
On Windows, I can use a tool such as ProcessExplorer to select particular a process and view values of each environment variable.
How can I accomplish the same thing on Unix? echoing and env cmd just show values at present time, but I want to view what values the running process is using currently.