How to run vi on docker container

Question

I have installed docker on my host virtual machine  And now want to create a file using vi   But it s showing me an error   bash  vi  command not found

User · Answer

Add the following line in your Dockerfile then rebuild the docker image   RUN apt-get update  amp  amp  apt-get install -y vim

User · Answer

Use below command in Debian based container   apt-get install vim-tiny   Complete instruction for using in Dockerfile   RUN apt-get update  amp  amp  apt-get install --no-install-recommends -y       vim-tiny       amp  amp  apt-get clean  amp  amp  rm -rf  var lib apt lists     It doesn t install unnecessary packages and removes unnecessary downloaded files  so your docker image size won t increase dramatically

User · Answer

error   bash  vi  command not found run the below command by logging as root user to the container-- docker exec --user  quot root quot  -it  container ID   bin bash apt-get update apt-get install vim

User · Answer

Inside container in docker  not in VM   by default these are not installed   Even apt-get  wget will not work  My VM is running on Ubuntu 17 10  For me yum package manaager worked   Yum is not part of debian or ubuntu  It is part of red-hat  But  it works in Ubuntu and it is installed by default like apt-get  Tu install vim  use this command   yum install -y vim-enhanced    To uninstall vim     yum uninstall -y vim-enhanced    Similarly    yum install -y wget  yum install -y sudo    -y is for assuming yes if prompted for any qustion asked after doing yum install packagename

User · Answer

To install within your Docker container you can run command  docker exec  apt-get update  amp  amp  apt-get install -y vim  But this will be limited to the container in which vim is installed  To make it available to all the containers  edit the Dockerfile and add  RUN  apt-get update  amp  amp  apt-get install -y vim  or you can also extend the image in the new Dockerfile and add above command  Eg   FROM  lt  image name  gt  RUN apt-get update  amp  amp  apt-get install -y vim

User · Answer

Alternatively  keep your docker images small by not installing unnecessary editors  You can edit the files over ssh from the docker host to the container   vim scp   remoteuser container-ip  path to document

User · Answer

If you need to change a file just once  You should prefer making the change locally and build a new docker image with this file   Say in a docker image  you need to change a file named myFile xml under  path to docker image   So  you need to do    Copy myFile xml in your local filesystem and make necessary changes  Create a file named  Dockerfile  with the following content-   FROM docker-repo tag ADD myFile xml  path to docker image    Then build your own docker image with docker build -t docker-repo v-x x x    Then use your newly build docker image

User · Answer

login into container with the following command   docker exec -it  lt container gt  bash   Then   run the following command    apt-get update apt-get install vim

User · Answer

Your container probably haven t installed it out of the box   Run apt-get install vim in the terminal and you should be ready to go

User · Answer

The command to run depends on what base image you are using   For Alpine  vi is installed as part of the base OS  Installing vim would be   apk -U add vim   For Debian and Ubuntu   apt-get update  amp  amp  apt-get install -y vim   For CentOS  vi is usually installed with the base OS  For vim   yum install -y vim   This should only be done in early development  Once you get a working container  the changes to files should be made to your image or configs stored outside of your container  Update your Dockerfile and other files it uses to build a new image  This certainly shouldn t be done in production since changes inside the container are by design ephemeral and will be lost when the container is replaced

User · Answer

USE THIS  apt-get update  amp  amp  apt-get install -y vim  Explanation of the above command  apt-get update   gt  Will update the current package apt-get install   gt  Will install the package -y   gt  Will by pass the permission  default permission will set to Yes  vim   gt  Name of the package you want to install

User · Answer

If you actually want a small editor for simple housekeeping in a docker  use this in your Dockerfile   RUN apt-get install -y busybox  amp  amp  ln -s  bin busybox  bin vi   I used it on an Ubuntu 18 based docker   Of course you might need an RUN apt-get update before it but if you are making your own Docker file you probably already have that

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