what is the difference between run and cmd in docker?
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RUN and CMD are both Dockerfile instructions. RUN lets you execute commands inside of your Docker image. These commands get executed once at build time and get written into your Docker image as a new layer. ... CMD lets you define a default command to run when your container starts.
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The primary difference is that Docker as a project is focused on the runtime container only, whereas OpenShift (as a system) includes both the runtime container as well as the REST API, coordination, and web interfaces to deploy and manage individual containers. ... A cartridge is roughly similar to a docker image.
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Check if Directory Exist The operators -d allows you to test whether a file is a directory or not. [ -d /etc/docker ] && echo "$FILE is a directory." You can also use the double brackets [[ instead of a single one [ .
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There is no difference since "npi i" is an alias for "npm install". Meaning it is just another name for the command. They both do the exact same thing.
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The nohup command ignores the HUP signal and thus even if the current shell is terminated, the subshell and myprocess. out would continue to run in the background. Another difference is that & alone doesn't redirect the stdout/stderr so if there are any output or error, those are displayed on the terminal.
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Learn the differences between them. Docker Compose is an official tool that helps you manage your Docker containers by letting you define everything through a docker-compose. ... docker stack is a command that's embedded into the Docker CLI. It lets you manage a cluster of Docker containers through Docker Swarm.
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What is the difference between a running and runnable process? ... Running the process is executing with everything it needs as well as the CPU. Whereas, runnable the process is on a run query and is ready-to-run. A runnable process has every resource that it needs to execute except the CPU itself.
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A PowerShell background job runs a command without interacting with the current session. ... To run a background job on a remote computer, use the AsJob parameter that is available on many cmdlets, or use the Invoke-Command cmdlet to run a Start-Job command on the remote computer.
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CMD is an instruction that is best to use if you need a default command which users can easily override. If a Dockerfile has multiple CMDs, it only applies the instructions from the last one. On the other hand, ENTRYPOINT is preferred when you want to define a container with a specific executable.
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Docker Engine accepts docker commands from the CLI, such as docker run <image>, docker ps to list running containers,docker image ls to list images, and so on. ... Typically, you install Docker Machine on your local system. Docker Machine has its own command line client docker-machine and the Docker Engine client, docker.
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To run Python scripts with the python command, you need to open a command-line and type in the word python , or python3 if you have both versions, followed by the path to your script, just like this: $ python3 hello.py Hello World!
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['Choose Run | Run on the main menu or press Alt+Shift+F10 , and then select the desired run/debug configuration. ... ', 'For the main clause: In the gutter, click. ... ', 'Choose Run <name> from the context menu:', 'Press Ctrl+Shift+F10 .']
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Docker Swarm can deploy containers much faster than Kubernetes, which allows faster reaction times for scaling on demand. By utilizing its own YAML, API, and client definitions, Kubernetes differs from other standard docker equivalents. Thus, Docker Compose or Docker CLI cannot be used to define containers.
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A fundamental difference between Kubernetes and Docker is that Kubernetes is meant to run across a cluster while Docker runs on a single node. Kubernetes is more extensive than Docker Swarm and is meant to coordinate clusters of nodes at scale in production in an efficient manner.
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Flags are a way to set options and pass in arguments to the commands you run. Commands you run will change their behavior based on what flags are set. You should read the documentation of each command to know what flags are available.
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Docker is container based technology and containers are just user space of the operating system. ... A Virtual Machine, on the other hand, is not based on container technology. They are made up of user space plus kernel space of an operating system. Under VMs, server hardware is virtualized.
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So what is the difference between start and run method? Main difference is that when program calls start() method a new Thread is created and code inside run() method is executed in new Thread while if you call run() method directly no new Thread is created and code inside run() will execute on current Thread.