containers

I am unable to run any yum commands inside my Docker container without getting the following error: ovl: Error while doing RPMdb copy-up: [Errno 13] Permission denied: '/var/lib/rpm/Group' You need to be root to perform this command. I'm confused because I'm pretty sure docker containers are run with the default user root. Still, if I try putting sudo in front of a yum install -y <package> or yum update -y command I get: /bin/sh: sudo: command not found I'm using the following base image so I can easily run a Java Wildfly application inside Docker: https://hub.docker.com/r/jboss/wildfly/ The

Should I use deque instead of vector if i'd like to push elements also in the beginning of the container? When should I use list and what's the point of it? Use deque if you need efficient insertion/removal at the beginning and end of the sequence and random access; use list if you need efficient insertion anywhere, at the sacrifice of random access. Iterators and references to list elements are very stable under almost any mutation of the container, while deque has very peculiar iterator and reference invalidation rules (so check them out carefully). Also, list is a node-based container,

I try to run the Visual Studio Remote Debugger in a Windows Container on Windows Server 2016 TP4 . Since it runs inside a container, there is no UI. I try to run the remote debugger via: .\msvsmon.exe /nostatus /silent /nosecuritywarn /nofirewallwarn /noclrwarn /port 4020 I am executing the above as administrator user (nt authority\system). This works fine on the host computer, but it does not work inside the container. The Windows event log shows the following error event. Msvsmon was unable to start a server named "`6D2D071453C5:4020`". The following error occurred: The parameter is

I am working on a h264 video codec. I want to know: Is a single NAL unit in H264 equivalent to one video frame? No, a sequence of NAL units can be decoded into video frames, but they are not equivalent. http://en.wikipedia.org/wiki/H.264/MPEG-4_AVC http://en.wikipedia.org/wiki/Network_Abstraction_Layer#NAL_Units_in_Byte-Stream_Format_Use http://wiki.multimedia.cx/index.php?title=H.264 来源： https://stackoverflow.com/questions/6858991/in-h264-nal-units-means-frame

I have a docker-compose file running a few Dockerfiles to create my containers. I don't want to edit my Dockerfiles to set timezones because they could change at any time by members of my team and I have a docker-compose.override.yml file to make local environment changes. However, one of my containers (a Selenium based one) seems to not pull host time zone and that causes problems for me. Based on that I want to enforce timezones on all my containers. In my Dockerfiles right now I do ENV TZ=America/Denver RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone And

Both act like a stack. Both have push and pop operations. Is the difference in some memory layouts? std::vector has several accessibility and modification operations compared to std::stack . In case of std::stack , you may have to perform operations only in systematic way, where you can push() above the last element or pop() the last element. std::vector is more flexible in that sense, where it has several operations, where you can insert() in between or erase() in between. The major point is that, std::stack needs to be provided the underlying container . By default it's std::deque , but it