As the title says when I try to run an 'apt-get -y update' command when building my Robotframework Dockerfile I get the error below:

/bin/sh: apt-get: not found

executor failed running [/bin/sh -c apt-get -y update]: exit code: 127

Can anyone help in explaining why this is the case as per my understanding this should run due to the Debian Buster base?

CodePudding user response：

According to the docker layers on the docker-hub site, it seems, that they decided to use Alpine Linux instead of Debian.
While adding new packages they used apk instead of apt-get, as can be seen here.

So you may want to use apk update instead of apt-get update